Pros and cons of different styles of tunes?

[ma.racing]

This is a Nelson site so you are going to get some biased answers but with that being said all the above is true! I had a mail order tune from him for a year with turbo, injectors, cam & stall with no issues what so ever. He's one of the best you'll find.

very true he is the only person i would trust with a mail order tune and boost and thats sayin alot