I ordered this mattress based on the reviews of others, so I hope someone finds my review helpful as well. I started out on a Sealy spring mattress which started to make my lower back & neck ache. I got rid of it and kept the box spring. For awhile, I put an air mattress on the box spring, but those are of such poor quality that they often deflated in the night, so I sought out other options. After reading many of the reviews of various mattresses I chose this one. One reviewer said that it is like a tempur-pedic and I agree. Although, the mattress is firm, you do sink into it and I believe it reacts to your body heat. Although I am still adjusting to it, I'm enjoying it more every night. The lower back pain the shoulder pain is going away. I think for the price it is an excellent purchase and a very good value. I would never sleep on a spring mattress again.