I went over to the local PGA Superstore at lunch today and inquired about the Mizuno Shaft Optimizer system. I basically wanted to use the results to help narrow down shaft selection for my current clubs, but in the back of my mind I may want to get a set of JPX-800s or 825s. The salesman in the fitting area set me up with a JPX-825 head and a shaft and away we went.
While not a full-on club fitting, which can take 1-2 hours, it did an acceptable job of looking at my swing parameters and selecting a set of shafts, along with club length and lie angle, that seemed to work for me. No charge. I also hit some shots off of a lie board using heads with different lie angles and shafts of varying lengths to see which would work better for me.
I had to get back to work, otherwise I could have spent more time looking at shaft options and lengths (within the limits of what they have on the cart) and dialing them in based on the simulator responses (not sure what system they use). The salesman seemed reasonably knowledgeable (at least he wasn't trying to blow smoke) and he gave me the fitting sheet with the Mizuno results and the impact stickers (face and lie angle) from my test hits.
I would recommend the Mizuno Shaft Optimizer system and fitting cart as a decent starting point for club selection (especially with a reasonably trained operator). All the better if you can get to use it at an outdoor facility to look at real ball flight. It will give you a good start as to type of club and shafts to look at, even if you are not looking to buy Mizuno.