TPR has a specific curriculum that you're expected to get through, and they do a pretty good job of introducing you to it -- but after that, you're pretty much on your own. Which is OK, since everything except the actual teaching is pretty much taken care of for you.
The Princeton Review demands high-quality work and rewards its employees with quality benefits and a team-oriented culture. Work/life balance is prioritized, but can depend on the manager. The main downside is the pay, which is about 15-20% below market standard for comparable positions.
TPR is a place where hard work is rewarded. The pay is not great, but the job is worth it. You must be self driven and organized to succeed. The days are full of events, talking with potential clients as well as University relationships. It truly is fun and rewarding