I had some trouble figuring out how to mount it, but finally decided it should sit on a Wide-Loader platform, which means I might have to keep the Wide-Loader on there permanently. That's going to make me a little wider on the left; I'm not sure if I'm going to like that -- but I am going to try it for now.
For a test ride, I packed the bag full of books and bottles and such -- a nice, heavy load. Minna followed me for a short jaunt down to the local creek and back -- it was fun! The bike felt great.
I'm looking forward to lots of use for this new bag (more pics here -- including one of how I keep the bag from hitting the wheel)!