We actually purchased 2 Twin XLs to serve as our King mattress. Both mattresses arrived quickly and in perfect condition without any annoying off-gassing or smell. My wife has been battling hot flashes and the graphite infusion technology really seemed to work as advertised--she was very happy not sleeping hot. In fact, she loved the mattress and found it comfortable for back and side sleeping. Unfortunately, I am a total princess and the pea, and I found the mattress supportive but too firm. It would have probably worked well for me with a 1" or 2" foam topper, but that would have made my wife sleep hot, so we contacted Tuft & Needle customer service after about 40 days into the 100 night trial. No hassle, no fuss, and totally AMAZING customer service team. We received a full refund right away, even for the 2x $50 mattress covers, without any attempts to loophole us in any way. You can trust Tuft & Needle to do the right thing. These guys are amazing!