Power Meters / Powermeters (SRM, Powertap, Quarq, Ergomo, Vector, Stages, power2max, P2M, 4iii, InPower, Cinch)

Never use GC - pisses me off. Plan rides on ridewithgps and use Strava (and now TP) for data upload.

Are there benefits to GC I am missing out on?

Nope.
I havent looked at mine for a year.
Just recieved an E-mail. Training Peaks is the one I get on best With.