I believe I hold the world record for most money ever spent with a professional bootfitter and while my skiing has improved slightly as a result, I'm not convinced all the time and energy was worth it.
More specifically, I went to a pretty well known bootfitter (the guy has even written a few articles for ski magazines). The fitting alone was about $500.00, which struck me as rather steep, but I went with the rationale that many here have stated about if you're serious about your skiing it will be worth it to have a properly fitted pair of boots.
Long story short, I get fitted, he makes up the cast and then does some measurements and says my alignment is off and that I would need to either get the boots shaved or put an insert under the binding of each ski. I say great, let's do it, at which point he says he does't have the equipment and that I would have to go see someone who did. Sends me to another bootfitter who does have the right gear to shave the boot and he then charges me $175.00 (we are now up to $675.00!!).
Now I start to think my skiing in my new boots will put Bode Miller to shame only to find I'm having terrible pain in one of my boots in the pinky toe. I then go to a podiatrist thinking it's a foot problem rather than a boot problem... the podiatrist charges me $75 to measure and xray my foot and tell me its a boot problem (now up to $750!).
I finally go back to original bootfitter to tell him about the problem and he proceeds to tell me the boot needs to be punched out. I say fine, he says "that will be an additional $125!!" I almost jump out of the not so comfortable high chair for adults to choke the guy, shout some expletives and say "you've got to be F'n kidding me!" Guy argues that he specifically stated that his fittings do not include any work on the boot, just the footbed.
After I made a few threats, the guy finally agrees to "accomodate" my request to punch the boot out at no cost. Almost cost me a total of $875, which is about twice what I paid for the boot.
One of the worst buying experiences of my skiing life!!