I have only had/used these pillows for less than two weeks, but "so far, so good", as they say! Which is why I only gave them a 4 star rating, as technically I think it's too soon to tell. I have severe spine (neck & back) problems and because I am a "side sleeper", I needed pillows that were nice and firm. These are plenty plump and seem to be holding their shape so far (but again, it's only been a couple of weeks). The quality is good, and I seem to have been sleeping better (must be the pillows, huh?)! At this point I would highly recommend them! But remember, they are quite plump and really fill out the pillow case. And, lastly, I most likely would not suggest or recommend them if you are a "tummy" sleeper!