My husband and I bought a select comfort bed in 1998. The bed was fine for about a year or two then it started to have problems keeping air in the chambers especially my husbands side. The center began to sink leaving no support. Trying to pump more air into it did not help the matter at all. Now both sides are sinking in the middle.We bought two pumps, the second one was refurbished costing 120.00. still problems. These beds are not cheap ours cost about 1500 dollars.We have a multitude of back problems that are costing us money, their customer service people are extremely rude they are ripping people off bigtime. NO MORE SELECT COMFORT BEDS FOR US.