My husband and I bought this mattress a little more than a year ago, shortly after getting married and moving in together. He sleeps deeply and restfully pretty much on any surface and under any noise or light conditions, so no complaints on his part. I however, have insomnia, so achieving restful sleep takes a lot of tweaking of my environment, and it also doesn't help that I have back pain due to a herniated disc on my lower back, which is why I was excited about getting this mattress. I've always preferred firm mattresses because the soft ones cause a lot of pain in my back since they sink inwards and provide no support. This = restless nights. But the firm ones weren't perfect either, because while my hip and shoulders would make contact with the mattress, my waist would end up floating and it was kind of an awkward position. So all the advertising with Goldilocks and the "just right" mattress really spoke to me, I figured the Purple mattress would be ideal. But after a year and a half of sleeping on it, I can't say I'm pleased with my purchase, and I really regret it because it was very expensive and I can't afford to change our mattress. The main problem is: for my body type, it doesn't work as advertised. The largest part of my body is the hip and butt area, and that area tends to sink into the mattress, therefore not aligning my spine. If I lay flat on the mattress WITHOUT a pillow, it seems like it -could- work... but then my neck is floating unsupported, causing neck and shoulder pain. Back pain? No. Neck pain? Obviously. If I use a pillow that is firm and thick enough to support my neck (not super thick, only enough to sit between my neck and the mattress), it ends up also lifting my head enough that it raises my upper body along with it, therefore causing my hip area to sink even more than it already was (because again, it's the largest part of my body), therefore making me sink into the mattress just like soft mattresses used to. It's almost like a reclining position, but this downward posture puts a lot of pressure on my disc and also makes it so my waist often wakes up a little numb (I'm guessing because of lack of circulation from extended contact with the mattress? Not sure). Neck pain? No. Back pain? Horrible. I've also tried using a squishy pillow, smushed it around to get some support under the neck, placed it so that my head doesn't rest as much on the pillow so as to not add enough height that it messes with the alignment of the spine like the previous pillow did... that squishy pillow just isn't firm enough to support my neck. Back pain? No. Neck pain? Absolutely. And I've tried every other combination of soft plus firm pillow possible, with no success. So every night I go to bed and have to choose which kind of pain I'll have that night, pain on my lower back, or pain on my neck. In addition to not being able to afford a new mattress, I also can't afford to try every super advanced, $40 pillow on the market, in hopes that at least one of them would work. So yeah, my husband loves it, no complaints, but I personally wouldn't recommend it because my body type did not align with the mattress as advertised. Might've been "just right" for Goldilocks, but not for me. Lastly, as for the supposed cooling effect and airflow of the mattress, neither of us have experienced anything of the sort, even sleeping with the AC and the fan on, and with nice sheets made out of this sporty cooling fabric. But there's two more variables to take into account 1) our bed has drawers underneath it, so no airflow, 2) the floor is carpeted (can't help it, apartment). So yeah, no cooling at all, but it may be partially due to our environmental conditions.