I've used almost every model of stereo Bluetooth headset ever made - all of them, from Apple Beats X, to good old Beats, LG, Sony, Plantronics, LG, Bose, JBL, Jabra, even now TaoTronics and 3 diff ones from Anker - I mean I have about 20 models at the moment. I've been curious about the new Jabra Elite Sport, but the $250 price tag has kept me from those, as well all of the other concerns mentioned in these comments - run time, connectivity, etc. My belief is that if anyone can get it right and for the RIGHT PRICE, it's Anker. The three Anker models I have (Soundbuds Sport, Slim, and now Tag [which may be the best of any I've ever owned]) have shown me it's possible to deliver great sound and performance at a realistic price.
Hoping you get this right Anker!! (although I have to say I'm generally leery of KickStarter projects....)