I would have hardly believed it myself, but after two weeks on this mattress (hardness H4) are way off my bad back pain. Previously had an IKEA Sultan foam mattress, which is the purest waste against it here. I just hope that it stays that way for a few years, and that the springs do not give in ... The price discount was perfectly adequate, unfolded delivery. Conclusion: Recommended! [Update 2015-06-21] After two years, the springs have yielded little in the middle, but still acceptable