This is my first pair of truly wireless headphones. Some of the things I worried about were battery life, would they stay in, and lastly sound quality. I have been using them for a few hours now from out of the box. They still show mostly charged when placed back in their case. They fit securely in my ear, I have not had any issues with them feeling like they might fall out. Even though the sound quality is noticeably different from wired headphones the sound being a little airy and treble. I only really noticed this when directly comparing them. I was anticipating some sound quality reduction based on other reviews I've read but the ability to not have the headphones tied to the phone is pretty cool especially when I can use just one as needed.