I can't give a long term review on this product cause i just received it yesterday. These slippers were a gift for my boyfriend. I slipped them underneath his very old worn slippers of ten years. From what i can gather from his response in discovering them there he is definently liking them.
He says they fit very well and he wears a size 11,,,but in slippers he says he wears typically a size 10.
But,,,these slippers seem to fit by what shoe size you wear. I wouldn't
 be nervous about them not fiting correctly. As from what i've seen and read many of these other slippers offered online seem not to be a true fit. As for the slippers themselves they look and seem to be very nicely made and should stand the test of time. Once again,,another good Amazon purchase!