Better than expected.  I bought this thinking that it would be only used occasionally  but it is so nice and comfortable that it will be used more than that.  I did let it fully expanded for 3 days before I dared to even sit on it.  By the end of the 3rd day it was fully expanded.  I do believe that it just might be more comfortable than the mattress in my room.  I really wasnt expecting much based on the cost of this mattress but it is better than most I have bought in the past.