they work well, but they don't speak English. when i put them in my ears and they tell me they are connecting or whatever they say, i dont understand what they are saying. it would be all well and good if it were a conversation not involving me, but its directed to me to supposedly tell me things i MIGHT want to know, but its in a language that i dont know. crazy, but definitely preventing a 5 star rating for me.
otherwise, batery life is good. sound quality is good. they stay in place 85% of the time, but i have dropped them more than once while walking. i do have little ears. i personally probably wont try them while sleeping, since they have fallen out while walking.