Yes! 100% Yes. A properly set up waterbed is the best possible sleep surface for your back. Properly filled a waterbed will self level. This creates minimal pressure points. Combine that with the fact that they are temperature controlled, keeping your muscles loose and relaxed. The next important factor is consistency. Waterbeds don't have the wear factor that spring and foam mattresses have. They feel the same 5 years down the road as the do day the day that you bought it. Combine that with the fact that water can be added or subtracted as your personal needs change throughout your life.
Are waterbeds good for your back? You tell us, come and try one out today.