I have had my sleep number queen size mattress model number 5000 for probably seven of eight years.  I am in my sixties now and have arthiritis and back probems.  My sleep number bed give my a much more comfortable night's sleep than any other mattress I have ever slept on.  My husband also has a lot of back and leg pain and he love's this mattress as much as I do.  For anyone who is  not familiar with the sleep number mattresses, it is the one advertised by Lindsey Wagner on television.  The queen comes with two controls which allows each person to set the firmness of his or her side to...