Love this mattress topper! It transformed my 300 mattress to a luxurious 1000 mattress. I dont feel the springs in my mattress anymore and I feel like I am sleeping on a cloud. I was initially concerned about the heat because it is summer and I am a hot sleeper, but it has not been an issue at all. If anything, this topper might actually be a little cooler than my mattress. Overall, Im very satisfied with this purchase.