I bought one.
The authentic one.

But it is a pain in the ass.
The audio was decent.

But, to connect and pair, rly annoying to completely pair both.

U pair right piece, no sound in the left piece.
U pair left piece, right piece gone.
The moment u paired correctly, it was accidental successful pair lol.

U dont even know the proper step to correctly pair both.

U just pair, and get your fingers crossed.
lol

Mine wear was fine during running.
No slip even sweaty.

But if u'r playing music, someone called, the bluetooth will disrupted and interfered.
U will need to off/on agn. (Or idk if its only me. Using ip5s)