Pros
The company is investing a lot in becoming one of the major players in the test prep world. They are growing very quickly because of this, so there's room to move up. They also really do care about the student's experience and are willing to turn down business rather than hire underqualified tutors. The standard for tutors is very high, which is a good thing from a student's perspective. It does making hiring harder, though, and this can create capacity pinch points during the busy season.
Cons
There are always growing pains with any growth company, so processes sometimes take a bit to get ironed out.