First I've read many reviews before buying. I was hesitant (read the negative reviews), but decided to try anyhow because this seems to be the best product for non-chamberlain/liftmaster products (by the way if you have chamberlain/liftmaster consider yourself lucky as that is the best product i've ever experienced; plus they have a separate more functional MyQ product).

DISPELLING RUMORS:
- this does support WPA2 Personal (all forms AES, TKIP, AES+TKIP); also WEP and WPA (but I strongly recommend WPA2-AES)
- this does work with my Genie Pro Model 1024 garage door opener
- this product does update frequently (so issues seem to be taken seriously)
- this product does connect to my router without difficulty (I have buffalo WZR-HP-G300NH with DD-WRT)
- ipad works with the iphone app
- android app also works (I have android v4.3)
- Registration with full address is completely optional now (even to set timezone as one reviewer complained about in past)

FEW KEY WEB LINKS:
- the manual for MyQ Garage
chamberlain.com/CatalogResourcesV3/en-us/shared/files/tucmanuals/114A4618.pdf

- FAQ for MyQ Garage (very useful!)
chamberlain.com/CatalogResourcesV3/en-us/ccv3/support/myq/2_2/en/mobile/advanced/resources/Toc_2.htm

- webpage to log into your garage
mychamberlain.com

INSTALLATION TIPS:
- install door detector on garage door (make sure top facing up; I strongly recommend screwing it in)
- plug wifi hub into any electrical socket, you can install it in the ceiling next to the garage door opener but I chose not to (note there is an obvious safety reason to install in your garage but my garage door has enough safety features)
- interestingly this wifi hub can serve as a "router" for setup purposes or a "wifi hub" for usage purposes. to setup you essentially are connecting to it as if it were an open wifi network
- wifi hub has 3 buttons (settings, #1, #2) I have no clue what #1 and #2 do... (see comment below)

- initially blue light should be blinking, this means it is ready to setup connection to your router (if you don't see this hold the settings button down until blue starts blinking)
- do android device setup even if iphone/ipad (iphone bluetooth/wifi thing didn't work for me). make sure blue light blinking. use your wifi to connect to the open wifi network called MyQ-XXX device (XXX is last 3 of your serial #). goto on your web browser (setup.myqdevice.com). The rest should be self explanatory.
- as another reviewer pointed out, there is a rediculously long list of supported openers, pick wisely
- solid green means it worked and is now serving as a wifi hub and connected to your real router.

- next is to link the door detector and garage door opener to the wifi hub and setup alerts
- for this you will need to the website (mychamberlain.com) or the iphone/android free app (search MyQ Chamberlain)
- The app is easier to use to setup door detector and garage door opener
- The website is easier to setup alerts (android app can't setup alerts after open X min for some reason)
- Test as much as you want

USAGE TIPS:
- note the wifi hub will flash light and beep loudly if you close the door using the app/web
- this does not auto-close after set time period (PLEASE add this feature!)
- alerts available? (door open/close, door open for X minutes, light turns on/off)
- alerts can be set to trigger all times/days; certain days of week; certain times of day
- it can email and/or notification alert your smartphone/tablet
- all alert triggers are stored for later review

- I've set mine to alert every minute from 5-10 to ensure I don't miss the alert by accident
- the smartphone app has option of using security 4 digit pin instead of email/pw for login/function access.
- yes you can set it up to alert multiple smartphone/tablets simultaneously

DOOR DETECTOR BATTERY:
- 1x lithium coin CR2450 (these are fairly cheap on amazon)
- very easy to access
- I have no clue about battery life.... (will update when the time comes... also see comment below)

RELIABILITY (UPDATE):
I set it from the beginning to email me with every open/close to test its reliability. I've had it for a bit now and initially I had the wifi hub in my kitchen actually. I think either the distance was too far from the door detector or the door detector was not screwed on tightly enough. I was getting initially random alerts that the door was open when it wasn't and vice versa. Small chance it was actually opened but i doubt it. I fixed both issues by tightening the screws on the door detector and moving the wifi hub into my mudroom. Since then I have had 100% reliability. I haven't experienced the router disconnects or other problems I've seen other users have. My wifi bar in my garage is barely 1-2 on my cell phone (part of the reason i'm using mudroom for the wifi hub).

will update as needed.

COST (UPDATE):
currently 130$, kind of pricey for just a monitor but i guess it has a monopoly on the market for now until other manufacturers catch up.

Alternatives you can consider...
- schlage electronic keypad deadbolt (approx 100$) -- this is awesome for any door but makes locking/unlocking the door from garage into your house easier. i strongly recommend this one which has a manual deadbolt motion after you enter the right electronic key instead of the motorized deadbolt motion as sometimes the deadbolt isn't positioned perfectly to close and you have to wiggle the door a bit. the motorized one will just fail. great by the way for a front/side door. this won't protect your garage from theft but it will prevent people from getting into your house thru an open garage.

- a new chamberlain garage door opener (example WD962KEV (approx 243$, now 203$ with father's day discount) -- this has myQ built in with the added feature that it can auto-close the door after a certain time without your intervention. also i've had one before with my prior house and the buttons are much more responsive than Genie. also the outdoor keypad works way better and can be closed without entering a key combination (makes sense as it allows you to close quickly from outside or let neighbors close for you without knowing combo). Honestly if i had the father's day discount i would have just upgraded my entire garage door opener.

OVERALL:
I'm very impressed with this device thus far. Strongly recommend for now. I've left my garage door open a few times every year by mistake. With thefts and home breeches in our area, this gives much peace of mind. Thank you Chamberlain.

Will update if things change.

Perfect for existing openers and need for App control and status. We always wondered did we close door. Did kids leave open when they left. We have a 2006 chamberlain liftmaster professional. Worked well and just what we needed. Fair price compared to others. Easy to install, if you read instructions. Wifi connection and phone app very easy. Install is two screws and power plugin. Door sensor is one button setup. Highly recommend.

Ceiling device connects to your home wifi.
Sensor mounts to garage door and "talks" to ceiling device.
Phone controls and monitors garage door.
We added a 2nd sensor to 2nd garage door.

Still can't get it to pair with my wifi, tho my smartphone has a good wifi signal in the garage. I just bought a new router to increase my signal throughout the home, I'm hoping that will allow this to pair. However I was really counting on the company caring enough to add IFTTT integration, and apparently they still haven't and probably never will. For now it's enough for me to get an alert if I accidentally leave the door open (assuming I can get this thing to pair with my wif,i which is not a given) but I am currently integrating my home into Smarthome centralization with Alexa control, and will have to replace this device with something from a company who cares enough to keep their products current. I'm pretty amazed that with all of the questions, difficulties, and repeated requests from customers for IFTTT, that Chamberlain hasn't even bothered to post a comment on Amazon regarding their product and the customers' experience with it.

Just installed this yesterday and will have a short video up soon about it. I was SHOCKED how easy this was to put up, less than 30 minutes for sure and works really great. I just wanted my garage monitored since I travel a lot and just to be connected to my home automation stuff so I could never be locked out, know if someone left it open, be able to give out guest access if needed, etc... Works really great. Basically it's just a Garage Remote, it learns the signal like your car or remote does. It then via the app > network > device operates as a garage door opener through your app sending a signal.

The smaller one that mounts on your door is the real magic compared to other similar items, it allows the app to know if the garage door is open or closed. I know several friends that had to put camera's because theirs they weren't sure if it was open or closed, which obviously makes you nervous. You might go to close it and actually open it. NOT with this one. It even tells you how long it's been open or closed. Highly recommend!

TIP: I will say it was MUCH easier to setup the wifi hub (larger one) with using wifi setup than using the bluetooth setup. I hope this helps it go even faster for you.

CON:
Only con is you still have to use their app or go through a hub like wink or smart things. I really want to see them integrate Google Home and Alexa into their integration so I can just tell Alexa or Google to check the garage or close/open it.

Originally worked as advertised, but after a Comcast router update it stopped. After several days of trying to restore the function, and hours on the phone with Chamberlain, there's no hope. I have 6 other WiFi connected devices, thermostat, cameras etc, and all restarted after the router update, but this thing is worthless. Chamberlain now says the router is incompatible. Really, that's their solution.
Now I see a lot of other's with the same problem, so perhaps they'll fix this, but my suggestion, if you buy one of these, is to make sure you can re-program this thing more than once during the first few months, so if yours decides not to work you'll be within the return-it-to-Amazon time frame.