Pros
This is one of the most unusual companies in the world. They stress the importance of being real, being casual, and having fun. A former boss once said, "If you're not having fun with this job, you're doing something wrong." The pay is good, too -- thanks to teaching for TPR, I was able to survive three bouts of being otherwise unemployed.
Cons
Sometimes management can have knee-jerk reactions and will shoot first before asking questions. Thankfully, this doesn't happen often. The biggest problem you'll have, really, as an instructor with The Princeton Review, is back-stabbing students and parents, who despite singing your praises while tutoring or teaching, and despite significant score increases, will feel you didn't do a good job. (Two examples -- I had a GRE student whose score increased 160 points but still gave me a terrible review, and an ACT student whose father was not satisfied with a 5-point score increase despite the guarantee of 3 points, and the fact that such a huge score increase is extremely rare.)