Raced the Vortex 70A in my B4 first time this weekend and it was good! I had it in sensored mode with SP Comp V2 6.5t Brushless and Savox SC-1251MG low profile servo. Track was quite fast so I had squeeze some juice out from my setup, I ran timing on setting 5 (12degrees if I remember correctly) and power was good.
I think I'm very satisfied to this ESC!