I bought these not expecting much. I generally don't like in-ear buds, usually I use cans, but these are amazing! They pair right up with my iPhone X, and then with my Apple Watch, with zero problems. Unlike most BlueTooth headsets, these do not lose connection when I turn my head. In fact, they never lose connection. The stock ear-pieces fit perfectly in my ears, and even act as passive noise cancelling. They do not slip out when I move, another common problem with ear buds. The package came with several replacement tips and some wings to add to stabilize the ear fit, but I didn't need any of them (which is probably for the best, since there are no instructions on how to change the tips or add the wings).
The sound quality is outstanding! These are instantly my best sounding headset, and I have a collection. These sound better than my expensive Klipsch wired cans!