I received the Motorola Bluetooth Keyboard yesterday, from last week's Woot.
The keyboard itself is very nice and comfortable to type on. The Android keys are all working on my Galaxy S3. The keyboard doesn't feel cramped while maintaining a small footprint.
However, the weight and thickness of the keyboard are more than expected. It is about as heavy as a tablet/ultrabook so it will weigh down your bag, and because of the slide-out touchpad, ends up being pretty thick too.
Speaking of the touchpad, it is terrible. I used it both in Android and in Windows 7. The sensitivity is very very slow, taking 4 swipes to get through phone's screen, and on Windows adjusting sensitivity doesn't help much. The multitouch gestures did not seem to work, and even pointing accurately required very hard presses. I notice the cursor is a bit skippy, so I think the flaws might be caused by a low refresh rate (to save battery life over bluetooth).
Aside from the near-useless touchpad, I am happy with it. Sturdy, comfy, looks good.