Also I haven't had a problem with the sliding. My hubby, who is a light sleeper hasn't complained one bit. I must say it really, really, really has made a difference in my reflux. If I travel and sleep in a motel or another person's home, I can really tell the difference when the bed is not raised. Now, since I have developed Barrett's Esophagus , my reflux has worsened so I also use a wedge, in addition to having my bed raised.
Many people think they do better by sleeping practically upright, propped up by several pillows.
Unfortunately, this is not the solution and can make the problem worse. When you sleep at a 90 angle instead of in a flat, slanted position, you can actually increase the pressure in your stomach and make aspiration worse. It is in this position that gravity works in your favor to help keep stomach contents down where they belong. Another important preventive measure is not to eat before bedtime. Doing so distends the stomach and increases the likelihood of food coming back up.