I was honestly nervous about buying a mattress in a box but I had been sleeping on an expensive pillow top that I hated for years. Figured it was worth a shot. Tired of paying for expensive mattresses that aren't worth two cents. This was refreshingly nice and firm, yet not hard, if that makes sense. The sides don't crush like some of the mattresses in a box. It stays firm like a real mattress would. I stay cool at night My joints don't hurt anymore. Highly recommend this!