I just spent what was probably my 10th night or so in the SS2 last night, and every time I use it, I completely marvel at it. For me, it is the perfect tent. I love the space, both on the interior and in the vestibules, the weight is nice and light, it packs down to just about nothing.
I spent several years using the original REI Quaterdome2, and about 3 years ago decided to go for a new tent. I tried a Big Agnes Fly Creek 2 (waaay too tiny), and then a Double Rainbow, which I loved. When I first saw the SS2, I realized that the design trumped the DR in every way except for the size of the footprint- the SS2 is a good bit bigger. That said, I have yet to have any trouble finding a suitable campsite. I've had the SS2 since the fall, and my only 'issue' has been figuring out how best to pitch it on not quite even ground. In general I use the 'Henry' method, and find that on reasonably flat ground it's drum tight.
I've had it on several feet of snow in the Sierra, all over the Bay, and for the past 2 nights, up in the PNW. Last night was in the Columbia River gorge, and I had no problems with condensation whatsoever.
Honestly, every time I use it I marvel at what a genius Henry is- this really is the perfect 3.5 season 2P tent for me. The design has me contemplating selling my Contrail in favor of the Notch for my solo trips.