I bought a medium-hard Smart mattress on the ritmo website for the promotion.I 've been choosing between companies for a long time .I was very upset about the purchase. firstly, as soon as you lie down on it , it rustles .it is not clear for what reason and which layer of the mattress makes this rustling .each revolution is accompanied by a sound.secondly, he is very tough .I slept the first night, although I couldn't sleep on it until 4 a.m., the feeling that I was lying on a stone or concrete or floor.... just a disappointment.I never would have thought that a medium-hard mattress would be so hard.and the consultant girl assured that the medium - soft one would be too soft .my weight is 50kg .the mattress does not move at all .I hope the Memory Mattress Pad will help.maybe they have a better mattress for 1000, but the cheapest is definitely terrible