It was so bad. The firmer one felt like a concrete slab and gave me terrible back pain. I put it on a Rove Concepts bed frame that had slats. They convinced me to exchange it for a luxury firm but sent me the same firmer bed again, only in the wrong size. Customer service was appalling. I purchased the mattress on Feb 13,2023 and didn't get it resolved or get a refund until April 26,2023. I ended up getting what I had before on my old bed, which was SO comfortable- a firm Serta coil mattress with a tempurpedic mattress topper.