Bike fit - what can I expect to learn?

[Possegal]

She did my fitting too, and my niece's. I love her!
She spent a very long time going over medical issues to see what injuries I've had (turns out only my wrists have gone uninjured - I should give some thought to bubble wrapping myself).

I'm thinking of getting a gift certificate for my sister so she can get a fitting done there too.

ETA - yeah she said she'd have put me on a larger bike. Which later the Trek woman's rep for the Northeast said the same thing. The woman from Trek actually looked at my sister and me and our bikes and said that we should each be on the other size bike. Jill adapted mine and it's fine, but she made a lot of adjustments. So my next bike, I bought from her.