Dyno tuning ?

This is my personal experience with a dyno tune brought my car to a very reputable shop that basically does nothing but dyno tuning and nitrous installations..he made adjustments timing,jetting ect picked up some h.p. and tq...took it to the track the car went SLOWER,put the adjustmaents back to where i had them,and the car was running the number again..lesson learned.there is no better tool then going to the track and test and tuning in real world results..dynos might be good for some but,i'll never use one again unless it's for breaking in a motor and even then the price better be right..