I recently purchased the I9 bed from Sleep Number. The bed was not the quality of bed used in their store/showrooms. The bed was very cheaply made and caused my husband and I both back and neck problems. The mattress pad zipper was broken within 2 days of use...the air chambers would not hold their settings for anytime and you would have to adjust them. You could feel the foam side and center walls under you. When my husband got into the bed I felt as if I were laying on a giant air bubble (like an old waterbed) and it wasn't supposed to... read full review »