More room than you'll need
This tent is huge, especially for a three person tent. I got it for car camping and backpacking for my wife and I and our dog. There's plenty of room for all three and we could certainly fit a third person in there.
The two vestibules are nice as well as the double doors. Tent is light for being as big as it is. One of the reasons I picked this tent over some of the others is the ease of use of NEMO tents. The rainfly and footprint (sold seperately) easily snap into the corners and remain secure. I also appreciate the ability to leave the tent behind and use the footprint, rainfly and poles to make a nice shelter.
It's certainly not the most lightweight 3 person tent you'll find, but you get your bang for your buck on this one. Also, can I say that the tent bag that everything roles up into is one of my favorite features. It's so easy and organized, it's fantastic.
Haven't used it in a storm yet but did pour water across the areas that I thought might prove to be an issue in the rain and saw no leakage.