Worth the money? While I was at school, a buddy bought a programmer for his 2006 Dodge Ram 1500 5.7. Another purchased one for his '05 F250 5.4. Both seemed impressed and even in the passenger seat I could feel a difference. Anyone here own one?

On a related note, another friend has had a Bullydog for his '02 F250 diesel for a few years and swears by it. Should I jump on the bandwagon?