My select comfort bed Model 5000 is the best mattress I have ever slept on.  From the first night I slept through the night with no problems.  I wake up every morning with no back pains what so ever.  Before I had this mattress I tossed and turned all night and the next morning felt so tired and achy. I would recommend it to anyone. 

It is really simple to put together takes about 20 to 30 minutes, so easy I could do it myself.