I was thinking of buying one , and my friends daughter got one
and said it wasn't any hotter than a ordinary mattress , but the
base has to suit the mattress ..
I've got them on all my beds but one and I think they do retain the heat. They are good for your back though but I can't do the heat even if I have the windows opena nd a fan on.I have the same problem as you tillyh345.
I`ve recently bought the Dorlux Cool Plus. It`s brilliant & does not make you all hot. Being "of a certain age" I wanted one that kept you cool & it does. I`ve had better sleep than I`ve had for years & dont wake up all achy.