I haven't been able to get a good fit, regardless of frame size. The PT helped, but wasn't a silver bullet. My shoulders start to hurt two or three hours into a ride. I wouldn't even know it was an issue for my short commute, but I've never been able to ride more than ~65 miles in a day because of shoulder and/or neck pain.

They fit me mostly by watching me "ride" on a trainer, stopping me at certain points, and measuring angles, eg of the shoulders, elbows, and such. There was lots of plumb-line, etc. They lowered my handlebars a bit, pulled the brifters back along the bar curves, and so on. They have a laser and video camera thing they can do to adjust your cleats and pedal position, but I skipped this, as my knees are fine.

I was thinking about going back to "fine tune" things on the sizing bike ... but I won't know if an adjustment is a good or a bad thing until I've spent a few hours in the saddle. So I'm not really sure how the contraption would help, in my case.