Being able to put the shifter where I wanted it was a major selling point for eTap to me. I've wanted to shift with one hand for years, and at last I can. These blips let me add a left shifter on my right brake hood. I just love it! I do with the buttons clicked or snapped a little so the had some tactile feedback. But still, they are well worth the price.
You are only paying for the licencing of proprietory telemetry.At close quarters you would be vulnerable to riders overriding if your drive train has 2-way FM band.A 10$blue tooth would suffice for the coach monitoring the cyclists' vital the bike's mechanical perameters