Was really keen to get these and were left disappointed. For this price i wanted an all round earbud solution i.e. used in the office, listen to music, watch videos, take calls and then to run with. The connection pairing was a headache as it had to be constantly disconnected and re-paired with my laptop multiple times through out the day. (part of that process was to connect the charge case to the laptop, drop in the earbuds, then remove and re-pair again.) If you didnt do that, it would only work with the right (master) earbud. When watching videos, the audio would be out of sync by at least a second. Worse when using YouTube and Netflix, almost up to 2 seconds off. Audio quality was great otherwise. Hence why its best to be used when listening to music only. Phone calls were of decent quality also. *only the right ear Once you got used to it, it was comfortable. There is a plug and twist technique which i found help sit them better in my ear and once there, it didnt budge. However, could only wear for about an hour before being irritated. The Bose app is minimalistic and doesnt give you many options, ie. no equaliser. Althought the "find my buds" are good, but only shows when last used - not a live GPS tracking. Overall, i was disappointed and returned the device after a week of use. I tried multiple firmware updates, devices and apps and was not worth me keeping. FYI - i have since purchased the Jaybird Tarah Pro's and i'm much happier, albeit the factory sound quality isn't as deep as the Bose, however the Jaybird app improves this and overall is a better package for me.