I am just ok on this mattress.  It is quite comfortable when you are laying flat on it, but any weight in a certain area (kneeling, or leaning an elbow on it) and you can feel the springs.  That being said, my son sleeps on it just fine, but he weighs 35 lbs.  I purchased a 5" wayfair memory foam mattress and I prefer that one over this one even though it's slightly thinner.