This is not my favorite mattress as an everyday mattress.  I feel that it is a little on the soft side and I am not convinced that it will last as long as a regular mattress.  However, for a guest room that isn't used regularly it is perfect.  I mean, lets be honest, we don't want our guests to stay forever.  I followed the recommended directions to let it open up and fill out for 3 nights before I used it for a night.  It was just over 10 inches tall when I used it.