Just got the case and am impressed considering the price of £20.
It looks and feels good, with a black metal back and black rubberised inside/keyboard surround (matching the nexus 10).
Very light and thin, adding minimal bulk when closed together
Pairs with Nexus easily and works instantly.
Small keys with limited travel will take a bit of getting used to, but definitely quicker than the on screen keyboard.
The front latch might get in the way of your right thumb when typing quickly, but not really an issue.
Charges via micro-usb, same as the nexus, with both parts accessible on the right side when the tablet and keyboard are closed together.
When closed the rubberised latches hold the tablet securely, but without damaging the tablet, and can be released easily.
The tablet sits in a shallow groove, which is secure enough on a flat surface, but does wobble a bit when using the touch screen. It can't be used to hold the tablet backwards (ie. with the keyboard behind the screen) which would have been a useful feature to use it as a stand to watch video. This is because the groove has an indentation on the keyboard which the tablet sits in, but not on the back side where it's flat.
It arrived fully charged, so I can't comment on charging/battery life yet.