Club fitting is not an exact science. This depends alot on the fitters' experience, equipment and swing behavior knowledge. From reading allot of the comments entered under this section I find that individuals go to a fitting with blinders on, relying on the fitter to properly fit them. The first thing one should do before going for the fitting is evaluate your present swing with the (irons) clubs you have. For example, if your present set of irons have a standard lie and you examine your divots and they are flat then you obviously don't need a 2degree flatter setting. This comment is made from personal experience, I went to a local pro for a fitting, he determined that after evaluating my swing that my irons should be 2degrees flat.End result never played well with the clubs, got rid of them. I think the pro was influenced by the fact that I am 5' 8" tall, he assumed that I needed a flatter club.
This applies to shaft flex, club bounce, club lofts, one should go to a fitter armed with knowledge, know what you are trying to accomplish. What results do you want?
I know that their are comments made that unless you go for a fitting you will never have the right club for your game. Maybe true, maybe false. However, I do know that knowing what you presently are playing with, lie, shaft, bounce and loft will help you evaluate the fitters recommendations.