These slippers are awesome - hands down the best I've ever owned, and definitely worth paying a little extra for.  The memory foam bed is so, so comfortable.  They are warm but breathable (not a common combination).  The rubberized sole allows for outdoor as well as indoor wear, and the construction is very durable and seamless.  I loved my pair so much (size 9) that I had to buy a pair for my boyfriend (size 13) - they both fit us true to size.  Highly recommend!!

UPDATE: After 6+ months and almost daily use, these slippers have held their shape and amazingly DO NOT SMELL BAD despite me wearing them in bare feet.  These are the absolute best slippers EVER!