All went well... not a huge difference / didn't really lengthen, but definitely evened out the gums! Very pleased with the result. I'll post pics after the stitches are gone (you can't see them, but I am pretty meticulous, so I'll wait).
In total, the procedure took about 1.5 hours. Weekly visits for a couple weeks afterward. No real pain, just a few little needles beforehand to freeze. That's after they freeze your gums topically with some sort of liquid, too - so nothing to fear.
I think the worst thing I did was google image search the procedure. Yuck. Ignorance is bliss when it comes to knowing what these people are going to do to my mouth. Man alive.