Looking for a cheap alternative to Airpods, bought these based on numerous positive reviews. Worked great for about 2 weeks, then the left earbud started cutting in and out during my runs. Always and only during exercise. I contacted the company and the response was that this was a known issue with iOS, and the solution is to download an app onto an Android device and update the firmware in the earbuds. I don't have an Android device!
If you have an Android device you might want to take a chance on these. When they worked, the comfort, sound quality and noise isolation were good for the price. I was very happy for like two weeks. I have since returned these and shelled out for Airpods, and those are WAY better. As they should be, given the price.