We currently have 3 mattresses from sinus. We love the customer service, prices, and of course- the beds! They are awesome. Each one is definitely different for each person. We just purchased this specific mattress, and it was defective unfortunately. We've had it for 8 days and the entire perimeter will NOT poof up at all.  We have trouble shouted this everyday with multiple customer service reps (which were great)  the middle is great but we are going to change and return this specific mattress. I understand that a new one can be swapped out, but it would be my luck that I get another decect, and I dont want to not like this brand for just this mattress.