It’s a well-built and designed tent. I used it in the snow on a climb of Granite Peak in Montana. We camped on the Froze-to-Death Plateau @ 11,000 ft, in November winds and snows. There was about 1.5-2.0 feet of snow on the ground, and we had several inches of snow every night we were there. Winds were steady blowing 15-20 mph, gusts, at night, to about 40.
Wind: the REI Subalpine UL does OK. It has a relatively high height:width profile so broadside winds really slam it and deflect the shelter. But overall, we didn’t have any problems. I’d be a bit worried about a 60 mph broadside wind.
Snow/cold: not the best application. There is a huge mesh vent in the ceiling and it will rain spindrift and frozen condensation down on you. For a winter double wall tent suitable for snow and cold, you should have an inner tent that can be completely sealed up with no mesh vents for best warmth and spindrift protection.
Setup is a breeze. Construction quality is very good. The fly is pretty tough to get really taut, due to some anomalies in how the panels have been cut at the factory, perhaps.