it seems the only hands on time people had with this phone was at the event. no review units.
this is the closes to a review from someone that's used the phone i've seen:
The guy had the droid ultra back in may, and then the maxx after that. he told us back in may that the droids will have dual core 720p, while all the major tech blogs were saying 1080p quad core s800, as late as July 22.
tl;dr: the Ultra sucked and the Maxx ruled.