I needed to replace my full-size coil mattress but could not afford the same type. I opted for the firm as I have many orthopedic issues. Delivery was awesome and days early. Unwrapping the mattress is definitely a spectacle! It took some time to get used to the mattress. I can't say that sleeping on it has made my pain any better, or worse for that matter. This is a good firm mattress and it is very comfortable, I can't imagine being comfortable on a softer mattress. It did have a very strong odor for about a week, maybe more. I must say that the cover is lovely though. I am not certain how long it will retain its firmness and shape, but it will certainly do for the time being.