I just got back from a backpacking trip in the North Cascades. The temperature ranged from very warm to getting 3-5 inches of heavy, wet snow, with some typical cascades rain interspersed. This tent performed very well, even with the flat roof which I was concerned about. I did have to get up a couple of times to sweep the snow off my tent. But, that is true with any 3 season tent. I was snug and dry the whole time. And, when the weather was warm, I left the fly off to star gaze.
It seems to be a very strong 3 season tent. We shall see how long that flat roof stays leak free. But, it's good for now..