Had a good play with this now, loaded up a few apps, synced it with my email and calendars etc.
Overall I'm impressed. There is a Google Play widget preinstalled (it's just not on the home screen by default), so you can access Android apps on it easily (one review I read said you couldn't). Some apps report as not compatible - I don't know if that's down to the device or just that it's Android 4.
Android 4 is a pretty good OS. I'm used to iOS, but I've found my way around pretty quickly. The calendar and email apps are nice and have synced with Exchange just fine.
As for the tablet, scrolling doesn't quite have the oily smoothness of an Apple device or high end tablet, but it's not slow. I've set loads of apps running and it's not shown signs of stuttering or running unacceptably slowly.
I've taken a few snaps - but they're not very good. They were taken with my iPhone, there's a lot of reflection on them and they absolutely do not show the true clarity of the screen - the coloured streaking across the white backgrounds is an effect of the camera and now how it looks IRL.
https://www.dropbox.com/sh/ynhv4us6s47w1bs/ZvsyZnd_1u
The screen is clear enough for reading books, the back lighting is even, I've not spotted any dead pixels and it's actually plenty bright enough (I only had it set to half-brightness earlier). Touch response is fine.
It does charge via USB - just not as fast as the mains charger.
I'd sum this up as getting 85-90% of the high end tablet experience at less than 50% of the cost.
If you absolutely have to buy the best of breed of everything regardless of the price, don't buy this.
If you want a usable tablet for under £200 I'd highly recommend it.