We got ours right from google as an early release to those who went to google IO. (they werent released at the con, but only about two weeks later. So we had them for a while)
The ones we had in the office were really great. Didnt once run into any problem other than screen scrolls were hesitant on occasion. However, the only reason we saw that was due to an article we read. Had we not read that, we may not have noticed it.
Nexus 7 is absolutely great.
That being said, each and everyone we had in the office has been sold, and we are all back to kickin ass with our iPads (gen2). But thats just due to the business we're in.
I think you cannot go wrong with that N7. I hope you enjoy it brother!
-Chrisso