Pros
The administrators are usually extremely understanding, and you can get vacation time off at the drop of a hat. If you're gone for a week, the administrators will not give you a lot of crap for it. If you're a Mathematics tutor, you will receive decent hours (20–30 hrs/week) all year round. On a side note, because most teacher credential programs require teaching students, this is a decent way to earn some of those hours. If you want to work somewhere either for the summer (the most profitable time of the year), or a year or so, this place is great.
Cons
It is obvious after having worked at C2 Education for years that the Tutors are seen more as a renewable resource instead of people to invest in. If you're an English Tutor, you're going to get bad hours (2–10 hrs/week). There are no benefits here, and tutors are dedicated part-time employees. It is nearly impossible to move up in this company.