Usually before I buy something I watch a lot a video review, this time only found one I told my self that I should buy the polysleep matress of whitch they is a lot of video review.,but I decided to by the zephyr instead. I weight about a 160lb and I am a hot sleepers. this bed felt so hard I wasnt sinking at all. I woke up at 3am unable to stay in bed due to the pain. This bed is made for those who like extra firm bed. I have already purchased the polysleep matress since I already thrown my old matress away. I'm still giving 4 star because the return is easy the don t try to change your mind, dont ask to many question and the bed is of good quality.