I am 150 lb and I would say this mattress comes in as not too firm and not too soft. I could see if you weigh a lot and prefer something more firm, this may have you feeling like you're sinking in. But to me it feels quite good.
When I first got the mattress I had to adjust for about a week, getting used to the feel, but now I would say it's definitely better than my old mattress which was indenting in the areas where I slept the most. Also, this could help with low back pain if you suffer from that, since the foam helps support in areas where older mattresses don't.
Quality seems good and everything was as expected, now it's just a question of whether it lasts.