I’ve done my research now, and turns out the density matters, yet most cheap ones don’t advertise their density because it’s low (higher density = better foam = more expensive). I believe someone estimated this pad’s density at about 2 pounds/square foot. Premium quality is about 5 lb/sq ft. This low density pad won’t keep your hand print, instantly returns to its shape as you pull of your hand. In fact, it is literally impossible under normal conditions to make a photograph with this foam topper like you see with other foam ads… its just too low quality. So yeah, the price is great, and yeah, if you want a bit of padding, it might do for you. But for me, on my ultra-firm (read: too firm) mattress, I wanted to soften it up with this, and the result was my entire ribcage hurt after an 8 hour sleep. I tend to sleep on my stomach, but I toss and turn, so sometimes on my side, sometimes on my back. The other night, sleeping on my side, just the side I slept on, my ribcage on that side, ached all day. I had to by Tylenol to compensate for the new pad. I’m better off without the pad, so I’ll be returning. I argue it isn’t what you’d expect from memory foam, especially if you’ve sat in memory foam beds in the store, where they use premium foam of 5 lb/sq ft. Buyer beware!

Side note: I experienced very low smell, and it instantly expanded for full Queen size for me. I let it air out in my room with window open all day before putting it on the bed, underneath a waterproof mattress pad. I did flip it midway through the day when I was airing it out, but I just laid it on my bed to air out. I had no problems with odor or expansion.

Rating: 2 / 5

You will find that sleeping on foams of different densities feels rough;y the same. The difference is in how long they last, the higher the density, the longer they will last.

Hopes this helps and sweet dreams.
Rating: 3 / 5