Lesson update! One woman randomly didn't show up, so it was just another girl and I, which was just fine. The weather held, and was actually sunny, windy and cold. I really like the way she structured the lesson:
Stretches on horseback
Walking in 2-point
Trotting without stirrups for a looooong time
Walking/trotting serpentine patterns
Canter work both directions
I was shocked when she said the hour was up; time always flies when I'm riding. It was a blast, I don't think I did horribly, she had some great suggestions for me working with Blaze (i.e. To drive him forward into the bit when he's trying to pull against it) and suggestions for getting him rounder/more supple. I personally need to do a lot of work on my seat, because I'm pretty wonky at the canter. I also need to feel for when Blaze is trying to drop out of a gait, like canter to trot, catch him and keep him moving.
All in all, money and time very well spent.