First impressions are good.
Build quality is good.
Voice search is much improved over ICS.
Downside is that there is no FLASH support - it is not installed and can't be downloaded from PLAY store or installed from a backup from another device.
The BBC iPlayer app (and a few others) is not compatible with the Nexus 7 and doesn't work via their website.
I suppose they'll catch up and allow it soon.
The Youtube app is working though.