I just made the leap with EFI Live this last December and I love it. It seemed a little over my head at first but once I got my exhaust this last weekend and had a chance to really use it for a reason its all starting to make ALOT more sense. I ran into a few issues but I think I have learned more in the last 48 hrs. about using it than the last two months. Also if your a big GM fan just check out their website and see how many cars and trucks it works with. Thats where you can really consider how much you save over time by going with it.