While the memory foam (TempurPedic) is deffinitely the most comfortable, in my opinion,the one draw back hasn't been mentioned,that being the warmth of the mattress. Here inthe U.S. we finally found a company that offers a form fitting mattress cover that was advertised as being considerably cooler for such mattresses. Hesitantly bought and surprise! it actually works. Sure the warmth is nice for our lengthy winters but it was unbearable in the summer months... presto-changeo... that's been remedied...