Review toward using the quietcomfort earbuds for 4 months : - Poor automatic connection with android devices (you need to start over if you connected the earbuds to another device) Which means once the case has no battery = no connection. - Left earbud has a different connection behavior than the right one - Aware mode totally shuts off loud noises which can be detrimental when you want to be "aware" of your surroundings. - Poor customization of shortcuts (play/pause, skip/ back... )