I bought these based on other reviews because I didn't know if I should go with the 10-HD or stay with the 9. These headphones are FANTASTIC!!! I use them to connect with my phone while driving and use them for my iTouch. They both connect at the same time so if I get a call while listening to music, the music shuts off and I answer the call. The sound if very very good. I have no problem with the buttons. The battery stays charged over 10 hours. I can leave my iTouch on my desk and walk down the hall to the printer and never lose the signal. They are great.