The headphones do not fit small heads or people with glasses very well. I have both. I tried using it upside down as other people had suggested. It did not work well for me. I still find it better then my other options. I just have to adjust it every 2-3 minutes while running. The buttons however stopped working the other day. First the right side. I assumed it needed charged (which I have to do once a day after only using it for 3 hours a day). That was not the problem. I charged it fully last night and this morning the left side decided to stick on low volume. I can no longer turn it up or do anything with it. This leads me to assume that my sweat has ruined the controls. I only bought this product because it says sweat resistant. I am in the process of trying to get an exchange. After reading the reviews and seeing that this was not just a "defect" I would like to return the headphones for my money back, but I don't believe that is an option. I would have really liked this product if it were still working after only using it 6 or 7 times. I hope the next one doesn't crap out on me too.