Pros
The content and test prep materials are some of the best in the business. For a large corporation, they are pretty responsive and helpful. There is some legitimate teaching and management talent and the professional development program is strong.
Cons
I was told by multiple supervisors that I was one of the "top 5 SAT instructors in New England" yet when I left I was making $23/hr, putting me on par with college kids painting houses. When I was given a much more lucrative and fulfilling opportunity, my supervisors cited corporate policy in being unequivocally unhelpful, if not deliberately in the way of my moving on. Kaplan will tell you without prompting multiple times that it is about helping students and improving lives, yet they operate as a for-profit corporation and will bleed families dry and shortchange teachers at every possible turn. Certain supervisors and management types posses a sort of arrogance that would get eaten alive in traditional classroom settings, and what is considered "teaching" is usually just working off a glorified script with small windows for creativity. Management can sound very creepy in how much they both serve and drink the Koolaid. If you are an educator of any worth, find another opportunity.