I've had this bag 5 winters now and it has been warm but it has some major problems. I take very good care of it and store it properly but the membrain lining is just peeling off the nylon around the head and top. It is no longer waterproof. You can see the down right through the nylon. This bag is ok for a year or two but for that much money I really expected it to last a little longer. If you want a quality product buy a Western Mountaineering bag, they are very nice and around the same price. You will have no issues what so ever, plus they are US made. WM also has a really good warranty. I will never again buy a Marmot product of any kind. Friends of mine have had all sorts of problems with jackets and other gear they make. Definitely a company to avoid.