I had a Puffy which I loved as it was designed for back and side sleepers. However, it did not help my lower back issues and unfortunately further the develop of pain. I’ve had this mattress for a week and already see improvement in my lower back pain. I placed it on my Puffy queen mattress as I try it out and so far so good. I’m very happy with this purchase and really like how inexpensive it is, we’ll worth the try! I had slept on a twin at my family members house and knew it was the right amount of firmness I was looking for to help my back. I would highly recommended this for anyone who is looking for a firm affordable mattress for lower back pain. I am not having any shoulder issues yet (bad shoulders too) due to the firmness. Well worth it!!