There is good and bad about every tuner. I have no experience with Dan so I can not say anything about him, but I have experience with Ed, Scotty, and Doug, not all my cars, but cars I have been involved in building and I was there for the tuning process. I can give you + and - comments on all 3. Its all personal preference and who you think can do the best job with your application. Just ignore all the bickering from these biased people.