I just bought $40 bluetooth earbuds that required RTFMing to pair, don't hold the pair between workouts, take a minute to perform the ritual, and use friction to anchor themselves to my ear so thy fall off the moment I start sweating. Oh, and they need to be recharged.

I have similar stories for every single bluetooth device that I have ever tried, which amounts to probably a dozen peripherals and half that many hosts. I've had fleeting moments of "it's magic" to punctuate the sea of crap so I'm fully on board with the potential of the technology, but it has continued to mature at an obnoxiously slow rate.