If I were in the market (IOW, if I had the $$$ and the willingness to part with it), I'd take the plunge and not worry about it. They've got plenty of experience with electronic shifting and braking, whether hydro or cable actuated. The only thing that's v1 about it would be the communication between the levers and RD and I'm pretty confident that they'd have that pretty well ironed out (and that they'd work doggedly on it if problems did arise).