I bought these for gym use and running, as they are advertised for sports usage. The good points: Great sound; good battery life. The bad: No matter what I tried they would not stay in my ears whilst running. I tried all possible combinations of earplug and ear locating tag sizes, but none kept the earphones in my ears.
The design is poor, as the relatively heavy battery and control pods pull the earphones out of the ear in motion. Basically, these are not fit for the advertised purpose