http://www.youtube.com/watch?v=b5s4IZzs55k&feature=player_embedded#at=199uli(creator of v-bar) is testing new gov with a castle esc. sounds pretty good, not much of over rev when coming out from a high pitch to 0 pitch
still think kontronik has by far better motor management and gov but for sure a good alternative for people who want to use less expensive equipment or nitro lovers
and by the sound of it not to impressed with 800 blades, cant do anything that 700 can do, maybe nice to flap around on very low rew but 700 can do that as well,
for me only alot of blade flap and big risk for boomstrike when 3d