Pros
Adjunct classes for the Early College Start program are usually on interesting subjects. I got to teach the British Literature class to high-school seniors and had a really good experience with Beowulf and other classics. There is a lot of freedom to develop the classes in the manner that you want, but don't go overboard because they do have some requirements, especially for the writing classes. Scheduling is usually pretty flexible, and as long as you follow the minimal guidelines and teach the classes well enough to get good reviews, then usually you have a "high recommendation" status for new classes.
Cons
As an adjunct, you don't really interact with other professors or other teachers at the schools where you teach. You can feel really isolated. I ended up emailing my teaching mentor from the first semester, so at least you have a point of contact that can be useful for brainstorming and even sharing stories. Obviously adjuncts lack all the benefits and pay of full-time professors (and even high school teachers, who essentially teach the same material as you do). Also, this is a program where high schoolers are skipping their AP/IB English classes to take "college-level" ACC courses, so public schools are basically saving money on full-time teachers by shoveling students into these adjunct-taught ones. My main frustrations, overall, related to management. The students and classes themselves were fine. I do wish that the high schoolers were given more introduction to college-level courses. I had to make the curriculum and format of the class a lot more similar to high school because they still didn't understand some of the basics of turning in homework and studying for tests.
