The mines ECU's are custom programmed by Mines for their individual customer cars in Japan for the high octane fuel in japan.
The cars get exported to foreign country and gets sold to some guy who thinks its going to work in his / her car.
Usual results is knock sensors going off its head and ecu running in knock map, or a engine melt down, or will not run at all, rarely you will find one that was tuned for a stock car that may work well.
Think of it this way, your mate gets his Apexi power fc tuned in his car for 300kw, you buy ecu from him put it in your car, do you expect you will have 300kw too? I hope not.
They should not be used imo.