It's like this... If ur doing a bone stock motor and never plan to upgrade or race... No real need. But if ur like most people on here u constantly change things. Hpt is not the best tune for ur truck. But u can either learn to tune it or u can pay a tuner a fee to tune it through emails. I'm am goin to buy hpt very soon. And in retrospect. I should have gotten it first thing. It allows u to log ur truck. Make subtile changes. Opens u up to a world of tuners that don't have the mail order option. Make any sense?