My husband and I after 25 years got rid of our full motion water bed. We kept the frame and came across new mattress for great price. "But", it was like sleeping on a board you could imagine our change. Tried mattress cover still no relief. Found the Serta 4 inch Memory Foam here. Read "ALL" the reviews. Took the plunge and so thankful we did. Yes it smells follow directions. Yes it was so worth it. Look forward to sleeping in our great bed. Now we don't miss the water bed. Back problems have improved.