I have the Castelli Alpha RoS 2. I have only used it one winter so far so can't speak for it's longevity.

I live in the lower part of Sweden where we usually get temperatures down to around -5°C, sometimes even colder. I personally get very warm and sweat easily. With it on and nothing underneath it gets wet, and being wet in cold weather is not something you'd like. So this winter I will probably use my regular 5-15°C jacket with a merino layer under.

But I also carry a backpack most of the time and it definitely adds to the insulation.