With just one quadruple-thick blanket ('duvet') you are either broiling or freezing, with no ability to peel back or add just one layer at a time. Can't understand how anyone can be comfortable with that.
I usually just stick my leg out. Works every time.
Maybe it's more a question about central heating? The temperature in my flat is in same 3-5 degree range most time of the year, so I only had to choose right duvet once.
