We bought our mattress (The Sleep Number) in 2005 from Sleep Train and payed $5000. We thought that it was the mattress we were looking for. They did a great advertising and confirmed us regarding the comfort of the mattress. It was sold with 20 years of warranty. For about two years it was fine, but then we have been having constant issues . The mattresses kept loosing air. We set it for 90 before we went to bed, but by the time we woke up, both sides lost air gradually. I started having major back ache, and called their customer service. Few... read full review »