I bought this but for a few months it was not working anymore. It's not turning on. When you place it on the charging case it will drain the battery on the charging case, and still the earpiece will not turn on once you remove it from the case. Now the unit is a one big paper weight. Pro: they are very light you will sometimes forget that it is on your ear, sounds great as well. CONS: The tap option is very complicated for me. And it died on me after a few months of use maybe about 2 months.
Thanks for the comprehensive review. Do you like these more than bone conduction (I use Shokz)? Passing traffic often drowns out the sound with bone conduction.