This is the thickest, softest mattress topper I've ever slept on!  It does feel like sleeping on a puffy cloud.  The only reason for my 4 instead of 5 stars is because it does make our bed warmer.  This is a good thing in winter, but not sure if I'l appreciate the extra warmth in summer.  If you're looking for the coziness of a downy-soft nest, this is the mattress topper for you!