It definitely sleeps a lot cooler than foam mattress tops. Definitely don’t need a mattress topper with this item. If you’re used to sleeping on 10-14 inch mattresses you will notice a difference going down to the 8, but it’s not a hard adjustment. It’s incredibly comfortable, but I think there could be more cooling functions for the price. Medium to firm feel, as advertised. Inflated almost instantly. Huge fan of the Lucid brand, and this mattress does not disappoint.