I just got back from a 10 day camping trip with this tent, and I love it.
As others have mentioned, it is very big. I am 6'2" and could easily walk around in the tent and vestibule. We had a queen size air mattres inside and it took up less than half the floor space. The vestibule was great to keep the bugs and sun out, and plenty big enough for two camp chairs. As previously mentioned, this thing would be nearly impossible to set up by yourself.
I had 1 day/night of very heavy rain and wind, and there were no leaks at all. I think the tent performed very well in the strong winds (much better than other tents i've owned). As long as you stake the tent properly (and use the extra guy lines to anchor it down) this tent handles the wind very well for such a large tent...much better than a lot of tents in campsites near mine that blew down during the night.
My only fault I found with the tent is that the 2 side shades in the vestibule just kind of hang there when they are closed, not really covering the screens all the way. The front 3 shades work very well and securely cover the screens, though. Not a huge problem at all...just thought I'd point it out.