Electrics certainly do eliminate some of the field support. I used Castle Esc's the first couple of years for brushless. Liked the ease of programming.
They are becoming OEM for a number of manufacturers especially in 600-up helicopters. No question they make a good product. My Thunder Tiger helis all use Ace/TT Esc and TT Ripper motors (E325 through E550S) although TT is now using Castle in their high end FBL series RxR's.
I fly glow, gas & electric in planes and helis. Actually have too much stuff but wife knows where to find me!