Our travel trailer came equipped with a king-size mattress that we soon realized was just too big for the space.  Switching to this queen-size gave us much more room around the bed but, most of all, we love sleeping on this mattress.  We have a good-quality mattress in our home that we've been very happy with but this one even beats that.  We like a firm, not hard, mattress and this one is just right.  Would highly recommend.