Purchased in hopes of a better night's sleep. Only slept on it 4 nights so far. Mattress is so heavy it is difficult to make the bed/tuck in the sheets. It is supposed to have a cooler feel to it and that does seem to be a bit better. Also not sure of the if the product is a Performance Collection Firm or not. Couldn't find that distinction anywhere on the mattress or receipts but the warranty asked for it, so I guessed. Is it a Kelburn II.