They are comfortable to wear in the ear and only "twist" slightly out of the ear when the wearer is running. My congratulations go out to the noise reduction setting and the background sound mode. They have a good connection to the phone and can do so rapidly (also Samsung). The sound is wonderful, and I'm quite pleased with how it turned out. Some cons: The clicks on the earphone are not recognized very clearly, and the app does not always count the correct amount of clicks. In addition, the parties involved in the conversation have voiced their dissatisfaction with the sound quality of the phone calls we have had with them, citing instances in which my speech became halting and slurred in the midst of the conversation, but when we switched to the phone, everything was normal again. The phones A51 and A53 were affected and continue to be affected by the issue.