We ordered a Reflux Guard bed wedge (queen size, full length of bed) a couple of years ago and we LOVE it. My husband suffered from reflux nearly every night and also had breathing issues. We tried other solutions but they all caused problems for me as I like to sleep flat on my stomach. All of them all cause the top of the bed to be angled up while the middle and bottom are flat. That does not work. Now that we have a flat surface for the whole mattress that elevates the top of the mattress and tapers off to the bottom we both sleep well. He has not had reflux problems since we began using it and he also breathes much better, which is an added bonus. Meanwhile I can still sleep flat on my stomach and get a good night's rest. We were concerned that we would find ourselves sliding down to the bottom of the bed, but that does not really happen. Somehow our bodies seem to have adjusted to the angle and I seldom find myself more than a few inches down from where I begin my night. No different than on a flat mattress. Lastly, we didn't have to purchase a new mattress. We just slid the wedge in under the mattress that we had and began sleeping better. As I mentioned, it has been a couple years now and there is no sign of the foam breaking down. It is as supportive as when we first purchased it. When of our best purchases ever.