I used it a bunch with the V1, and a few times with the V2, but various computer issues made it an unreliable system for racing. Not EFILive's fault, mostly me making a mistake, Windows screwing up, and notebook battery issues. Given the opportunity, I'd rather leave the notebook at home.
It amounts to removing things from the system. If you have 10 things that could go wrong, having 9 is more betta. Life was grand when I was running 13's in a stock Camaro. Now life is exponentially more complicated. At least a hundred things could go wrong now. Paperwork, safety equipment, programming, turbo selection, transmission, gearing, tires, weight, procedures, logging, driving, fuel, transportation, accomodations, etc, etc. Anything that can streamline things is a blessing.