What exactly do you want to know?
I'd try it once at the eurobike 2015, was great
But unless it's a fully automatic gear, you should give the shifting always a second time without pedal power.
r-m.de/en-en/technologies/shifts/
r-m.de/en-en/e-bike/supercharger/supercharger-gt-nuvinci-hs/#18X04_26010507
r-m.de/en-en/e-bike/delite/delite-gx-rohloff-hs/#18D10_05020709

I guess yo already know this page:
bosch-ebike.com/us-en/products/eshift/