HawkeyeMS
Ryder Cup Winner
Nonsense, they come with a tool and instructions. You change the setting and hit some practice balls. You see what the setting change does and if you don't like it you change it back or try another setting.
You absolutely DO NOT need to go to the expense of a fitter and a monitor solely to adjust a driver to the setting that works best for you.
It's not nonsense at all, how do you how much backspin you are putting on the ball? Reducing the loft can severely change the amount of backspin on the ball as well as the launch angle both of which should be optimised to get the best results. Doing it yourself you have no idea what these numbers are. You might find a setting you think is right but without the numbers you will never know. They come with instructions and tools so that people can think the driver can fix their faults, but it can't.