I've tried to warn people of tuners out there who are less than reputable. In response to Martin, I think everyone who read your post, no matter what they feel about Hennessey is very happy that you had a good experience. You are not the norm, though. Knowing what I know about his practices, you might not even have what you think you have. If I were you I would be inclined to test your car against a dyno. I'm sure he gave you the dyno results and I hope they match up.
I also feel he has done alot for the Viper community and is probably the spark that ignited many mods and tuners as well. Maybe it's because there are more tuners out there (more competition), that we keep hearing stories of people being ripped off. One would think it would make him more consciencious? I cannot go into my details in a public forum because of pending legal action, but anyone who hasn't already emailed me, please do so and I will tell you about what happened to me. I don't want to see anyone else losing their hard earned dollars. My wife always said that if anyone out there really new me there would never be a question in their mind about my truthfulness. Of course there are always two sides, but please don't ignore it when so many people come forth with similar experiences. It's not just a coincidence!