My wife and I have never bought a bed online before. We decided to try the Beautyrest Comforpedic by Simmons. After we cut the plastic, we let the mattress expand for the full 48 hours, before we slept on it. We have had it for about 2 weeks now and we are completely satisfied. There was not even a " break- in" period , that we anticipated we would have to get used to. It has helped with our body aches that was caused by our old mattress.