DC Rainmaker’s review is up: http://www.dcrainmaker.com/2016/04/sram-red-etap-wireless-shifting-system-in-depth-review.html
You push the buttons and it shifts.
To me, I am less interested in having it on a tri bike - 1x11 with one shift cable is fine for me. The appeal is to get eTap on a custom road bike with no holes, cable stops, etc. This is why I see myself buying an eTap system in the next few years:
