Works - can't speak to durability
Instructions insufficient for the newbie - had to watch internet video to get the hair to stay on, but I probably could have figured it out with patience (I really don't do anything with my hair normally).  Not really sure they are an improvement over regular curlers with sleeves though!  First use had trouble getting curls close to the scalp, but was able to achieve a wave in just a couple of hours of wear from dry hair (fine, straight caucasian hair), although it didn't hold up to being brushed.  When you leave them in overnight or to dry from wet, they really do the job.  Slight chemical odor from the foam - expect that will go away.  Not sure how long they last, especially if you choose to use heat with them, but for the price I think they are good.
Rating: 4 stars