Typhoon I did an Edel fitting a couple of months ago. It was at an indoor location that had a max putt length of maybe 20 feet. It took around 45 minutes with the laser, swapping out heads and shafts.
In the end, the fitter put a dozen balls down about 12 feet from the hole. I made 7 with the Edel putter, pretty good. Then he told me to get my old putter and see how I did. I made 10.
No new putter for me. In that small space, I thought the fitting was worthless. Luckily, it was a free fitting....appropriately priced.