I got this because I have L4/L5 sciatica. After abdominal surgeries years ago, my back has straightened out somewhat. My chiropractor gave me an expensive piece of foam for my back that helped a lot, but flattened out after a week. I ordered this -- which is much bigger, and made sure to get the "firm" variety. I started using it at work and it made a huge difference. Instead of leaving work with more pain than in the AM, I started leaving with less pain thanks to sitting with this roll behind my back all day. After 5 months of constant use, it has not flattened at all, and I use it all day -- at work, in the car, at home, and sometimes even in bed. I'm ordering another one!
Rating: [5 of 5 Stars!]