nothing wrong with buying a used tuner as long as its not locked. the only way to know is if you hook it up. at that point you call the person you bought it from and curse him for your first homosexual experience,cause you just took it in the arse.
i know ppl have said set it back to stock in front of you.But if you don't know what stock is,then your screwed.When set back to stock,it should read 0.Thats how you know for sure.
I have heard good things about it. I have noticed tho that allot of chevy guys use that brand of tuner
The reason i ask about bullydog is a guy at work just got one on his stroker and was looking into the gas one for his son's f150 and the salesman said its better than the edge but i haven't really heard anything