Very pleased at price of $5. For that low price, i was notin dire need of one, but it turned out to be a fine impulse purchase.
My item promptly arrived From "Wirelessfinest" Amazon seller in 3 business days by USPS with standard shipping method. I was a bit skeptical with mixed reviews, but mine worked right out of the box with both my and my wife's ipad2, no problems.
I have tried the USB port to a camera, sd card (8gb), transflash (16gb), Sony memory stick (1gb), and Sony M2 (4gb) with all options working. I do not have a MMC card to test out (does anyone still use this older format?). So for me I can say that 4 of the 5 formats work as advertised.
The dongle is about the thickness of the iPad, and a small boxy lightweight rounded edge chunk of plastic you attach. As others reviewers noted, ignore the back of package instructions, and FIRST attach the sd card, make sure the small USB / MEMORY CARD side switch is correct before plugging into the iPad. It takes up to 15 seconds for the iPad to recognize the card, power on and go into photo viewer. You can delete or import photos (and videos) from the cards DCIM folder into the photo collection only (just like the real Apple one).
What can you do with the camera connection kit, you ask? Well, it's mostly for travelers wanting to upload or proof photos n the go. Honestly, if you're traveling, nowadays you can buy cheap large sd or transflash cards to "keep shooting." I found that overseas, where I don't take a huge AT&T iPhone data plan, that I can take my (non-carrier locked iPad with local microsim and use that for getting photos uploaded from the better camera in my iphone 4 via a USB cable (take charge cable, plug USB end into camera dongle, then plug dongle into iPad). Now I can access my iPhone photos while traveling with data roaming off.
You can use it a bit cumbersomely for movie storage, by storing ipad compatible videos in the DCIM folder. So you can delete old movies off the iPad, then upload one from a memory card into photos. Note, that unlike iTunes uploaded video, it will think its a camera video, and be in photos app. You won't have access to resume from spot, subtitles, and few other niceties as with videos. But it's a poor man's spare storage. You cannot play directly off drive it seems. You can apparently use a USB hard drive, only if you had a powered hub, if things are in a DCIM root folder, but I haven't that myself.
The USB port can be used with most USB keyboard, USB sound microphones, and USB speakers. A caveat is that for high power devices, you prob need a powered USB hub. I personally find the built in mic and speakers adequate and easier for travel with Skype. I do not use a microphone, even for the versions of Dragon Dictation Remote microphone and Dictation Recorder on my iphone i use occasionally for notes (with noise cancellation on the two iphone 4 mics, it works better than a wired headset mic into the computer). I also have mobile Bluetooth keyboards, so I'm not planning to use these additional features.
Finally, similar to the official product, it is only for importing into an iPad. It does not work to import photos into my in all, it iPhone 4. Just had to try it though. All in all it's a sometimes useful extra trickout for my iPad. I expect to use it the most when visiting mom and dad's house with their grandchildren to quickly import a copy of a photo via SD card from my dad's or brothers DSLR camera, before departing. It's faster than emailing photos, and then you get to proof and pick what to import. Hope my review helps you.