We purchased this bed a few months ago, it is now January in Wisconsin where we live, and we wake up almost every night feeling too hot. The bedroom is about 60 degrees at night and we have never had problems sleeping too warm before now. I was concerned when we bought it that it would feel cold because it contains cooling gel foam and breathability features to regulate temperature. Now I understand why it would need these features, but despite them, this mattress still seems to retain too much heat. The bed is very comfortable otherwise, we like that it is firm, but has a softer memory foam feel to the pillow top. While sleeping on the old bed, I often woke up with soreness in my shoulder or hip and am glad to no longer have these pains while sleeping. But now it is rare if we can sleep through the night without waking up to throw the covers off (I am 34).