The mattress is really comfortable for side sleepers and if you prefer sleeping in "unhealthy" positions, this mattress won't "punish" you for it (i.e., my other mattress is quite a "hard" one and if I don't have the right posture in bed it makes the tip of my "tail" hurt - i.e., the coccigean bone). While this is definitely a firm mattress, it does have some bounce and reasonable cushioning, so it's slightly on the medium side of firm. Beautiful finishes, double sided, four handles, reasonable thickness (the fitted sheets actually fit it)... I am really pleased with this mattress overall and it does beautifully for the guest bedroom (where not everyone wants the very hard surface that I usually prefer for every night sleeping)...