THEY ARE THE MOST WONDERFUL PIECES OF EQUIPTMENT EVER! My husband took a month and half to get use to it at age 46. Once he did, he actually got a good night's rest, feels better, wakes up on his own and has great days whether he is working or playing. We are so happy to give up a litle snuggling (snuggle first and sleep later :) We have a king size bed and always try to get them when we are traveling. The cats and dogs don't mind it so we are all happier. I get a good night's sleep because I am not constantly pushing him all night to make him breathe!!! We don't go anywhere without it!! Even Spain, cruises and even around the state :) Try it :)