After 3 1/2 years, I must spend $300 to put bed back in condition it was when I bought it. Initially bladder on one side of the bed leaked and when I opened the outer shell, I discovered the single sheet of foam above the bladders was ripped and finally the zipper pull on the outer shell disappeared so I couldn't use it.
So after a few years, even with the warranty, I'm spending substanial money to make it like new. The model was C4 and without these corrections I must refill the leaking bladder many times a day to keep it inflated to degree shown.
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