Had one on my 30 AV8 roadster. Bought it early on in the production. It ran great for a few weeks but I guess when I wired it, I pulled the wire tight and it rubbed on the rotor and shorted it out. They fixed the issue with a clip to hold the wire in the current versions so it shouldn't be an ongoing problem. After some back and forth, I sent mine back to dealer I bought it from and he had to rebuild it. When I pulled it to send back, I put a stock distributor back in. When I received the efire back, I just put it on the shelf. Might put it back in next time I have the front end off my car but I am not in a hurry. Other than my wiring issue, it seems like a good product, works well and mechanical advance is nice.