I really don't have anything bad to say about this mattress pad. My girlfriend has a much more expensive 3" mattress pad and I can't tell the difference. Mine came very quickly, props to Overstock.com, and it did not have a bad chemical smell. I opened it up and laid it on my bed and it expanded to full size in a few hours. I do notice that it makes the bed slightly warmer than before but I think that is something all mattress pads will do. This thing is extremely comfortable as well, it's like I paid $**** for a new mattress.