ive had this bed just shy of a year on an adjustable base. It's amazing of course. Took some time to get use to the "stuck in mud" feel. But now i wouldn't have it any other way. I really can't dont think it stays cool all night. Just feels cool when you first lay down. A year in i noticed i could feel the springs with my knee when i got into bed. Then i noticed there was a huge 3 foot across T shaped tear in the mattress all the way down to the springs. I never would have expected that to happen in less than a year. They're replacing it but its a hassle, especially during this pandemic. Hopefully this wont happen again.