We bought the ReST mattress. My wife has a herniated disc in her lower back, and she had been waking up with back pain every morning. We had only owned our prior traditional mattress for less than two years before it started to cause her to have pain. We realized she needed something both supportive and adjustable. Other adjustable we air beds we considered did not have control over all areas like the ReST Bed does. We also really liked the 10-year full warranty after we had to throw away our prior $1200 traditional mattress after just 20 months due to indentations and therefore poor lumbar support. We have had the ReST Bed for 3 weeks now, and my wife now wakes up pain free! On top of that, after several years of sleeping on her side due to her disc issues, she has even been able to start sleeping in her back again – amazing!!! The app leaves a good bit to be desired, and we hope ReST will continue to perfect that as much as they have perfected the mattress itself. (The bugginess of the app was the only reason for 4 stars instead of 5.)