At first I slept a little slower, but it was during the day no longer at tense as before. Especially in the morning I felt really relaxed. And I thought that I had the privilege not at more than belly sleepers.
For me as a stomach sleeper this mattress is perfect. Here I weigh only 70 kilos. I hope she keeps this hardness long.
Only on the back I could not sleep well on this mattress. On the other hand I can not sleep on your back anyway.