I've been camping in my 12x12 Outback Lodge for several years now. I can't say enough good things about it.
Very stable even in strong wind/storms. Never leaked even once, and I've never treated it. Lots of room for two cots or air mattress', a couple folding chairs, small table w/lamp, and enough room to stand up to dress. It doesn't really sweat much because it has built in vents. And it even comes with a center pole for late night dancing.
The zipper can be a bear but I fixed that by cutting away an extra flap that wasn't doing anything anyway. Now those middle of the night quick exits don't result in swearing and cussing.
My wife used to hate tents until I bought the Lodge. We take ours every year to ATAR.
Get the 12x12, you will thank yourself every time you use it.
Dave