I’ve only has this bed a few nights but it’s even better than expected. I waited 1.5 days before using it but it seemed to have inflated to full size after an hour or so. The corners do not sag at all, something I was worried about happening due to previous reviews. This mattress is slightly firm with a good amount of give and support. I currently only have it on the ground, as my bed frame hasn’t arrived yet, but even without any support it’s still very comfortable. It is also a good thickness- it’s just thick enough to still allow regular sheets to easily fit.