I bought these pillows as I like a firmer pillow and hate my head overheating if you know what I mean. So far (1 month) My wife loves her pillow and I am still experimenting. I found the temperature excellent but purchased a bag of the wool to make the pillow harder. I have now found that the pillow is too hard and removed some of the contents. As I like two pillows the combination of a memory foam one with the Woolco one on top is a little too high, so have now replaced the foam one with a softer pillow that is not so thick. So far excellent but time will tell. The bonus with the Woolco pillow is that you can adjust the filling to suit yourself and I would definitely recommend.