I have a Tempurpedic mattress, used it for 10 years in Oregon and hope that it will still be comfortable now that I'm in SoCal. My son and his wife had one in SoCal but thought it was too hot. I've used a topper, but its comfort depends very much on the quality and comfort of the mattress beneath it. There are also other brands of memory foam mattresses, usually less expensive, worth looking at.