Pros
Co-workers tend to be intellectually curious, fun, smart people. Many managers started as test prep teachers, so they're smart and have good people skills. Managers who weren't hired as teachers generally fit in with those who were, so they're also good thinkers and good with people. Also, a lot of job roles are remote, and working from home is great. The work itself can be rewarding, if you either enjoy standardized tests or enjoy helping people do well on them so they can access greater opportunities in life. There are opportunities for advancement and for lateral moves to do a lot of different things, although competition for openings tends to be stiff because your co-workers are so talented.
Cons
I've hardly ever worked less than a 60-hour week. Many people work when they're on vacation. Holidays are basically days without meetings when you can work without interruption and catch up. The pay is about 15%–20% less than market for the same skill set.