I bought one of these 5 years ago to disconnect myself from the cable modem when I wasn't surfing (I have a cable phone service so it is always is on). I have never had one problem with it. I was looking for another today because I now have a wireless network with my wife's laptop and a printer on it. So now we have to leave the wireless router on for my wife to print her many photographs. I still like taking my system off our network while she surfs but now I also want to separate the router from the Internet so she isn't exposed while just using our network printer. So I am getting another one. This unit has little suction cup feet and stays where you put it. This is a good quality item and is well made. You may say I'm paranoid, but when I throw my switches no one can get into our system(At least online). Just a note it takes about 30 seconds or less when I reconnect to the router to get back on the net.
I work in cyber-security so I'm a bit anal about protecting my computers, e.g. all of my computers at home are hard-wired - the wireless on my router is turned off. I wanted a simple way to disconnect a computer from the Internet and this does it well - connect your computer to the A port and don't connect a computer to the B port, so when you select the B connection your computer is not seeing a network.
4 starts because this is way larger than it needs to be.
A very solid performer so far. I purchased this to be able to switch between a PS4 and an Xbox One. No performance issues whatsoever in terms of download or upload speeds. (These speeds were the same prior to the installation of this unit when I was switching cables manually back and forth.) The box is sturdy. Outer casing is metal. I received mine in black, not beige. (Black was the preferred color, anyway.)
This switch is a little pricey, but it does what is supposed to do, at least so far (one month of use). I could not find the following information in the description, and it might be of value to some customers: All of the wires coming from the connector are switched by a rotary switch.
Found that I could use it with my landline phone as an on/off switch to prevent ringing while my wife is sleeping [of course I could just unplug the primary answering machine but this is easier& quicker by just turning the knob].
A great device to keep my computer off the Internet when using it for other functions. Be aware that when you turn it back on, it will take 3-5 minutes for your computer to find the network once again.