Love this mattress! I followed the instruction and let it expanded for 3 days, tho it looked fully expanded after day one. The material feels soft and smooth. We have been using this mattress for a week now, and it's great! It's thicker than my old mattress which is nice. It has just the right firmness for me, no discomfort at all from day one. It's comfy to sit on as well, I've been doing all my work on the bed!