This has been worth the expense as my husband and I are not compatable sleeping partners! I was always too hot under our goosedown duvet and he just about right, but having had experience of a single wool duvet I persuaded him to try out the double - we have the Autumn and Summer ones clipped together. They are quite weighty if you are used to goosedown but so good. I am sleeping much better and no complaints from my other half. The other thing that I like, when one of you turns over you somehow don't land up with a cold gappy back that happens with a down duvet. I'm thrilled!