This is a great mattress. I love a firm mattress, and this is definitely it.  It is comfortable, but certainly very firm—I’d say on a scale of 1-10 with 10 being the most firm…this is an 8 or 9.  It is not hard, but noticeably firm. I purchased this for our guest room because a family member likes a firm mattress when she visits.  The mattress expanded nicely, and it was ready to sleep on in 24 hours, no problem.