Here’s my experience. I’ve been through iron fittings at Club Champion, and with a local fitter in a small chain store. The CC fitting was a failure, I returned the irons after 2 rounds. Same with the small store. Club Champion also did a putter fitting, I’m still playing that putter 5 years later and based on the fit numbers, I know exactly what to look for, if I try a new putter, (I won’t). I think putter fitting is the easiest of the fittings for fitters to get right. The lasers and computers take most of the guesswork out of it and are more accurate than launch monitors.