I was so scared to purchase a bed on line! I mean who does that? I read the reviews thoroughly, everything people liked and didn't like was accurate. This is a memory foam mattress, it is hard at first when you lay on it. You can feel the cooling gel immediately, one of the main reasons I purchased this mattress. The price is great and the height is perfect, I didn't need a box spring because the mattress is plenty high. This mattress is well made, very little smell, very solid. I am not sure if this is the case with memory foam, but when you sit on the edge of the bed, you sink quite a bit. Sleeping is great though! Love it!