I've been suffering from sciatica, spinal stenosis, and a baker's cyst on left knee since last December, I purchased a memory foam bed for my queen sized bed, which gave me a marsh mellow effect, so I ordered this one with the option of firm, when it arrived I took it out the box laid it flat allowed it to expand and slept on it, I slept VERY comfy did not wake up in pain and was able to sleep on my back without feeling numb. There was a very slight odor with this mattress, but I have a mist air freshener that spray in the bedroom every hour, so the sent dissipated quickly. I would recommend this mattress to those who are suffering from debilitating issues, or suffering from any types of aches and pains.