comparing it to bullydog is apples to oranges. The actual programming a tune into the ecm with efi is pretty simple, but there is defiantly a lot more to the tuning. There are some vendors who will tune an ecm for you and return it. A dyno is nice but a lot of these guys have tuned so many trucks that they can get it pretty close on the first try. If you decide to buy efi then you can log and send that log to your tuner and they can go from there.