Pros
Their curriculum is generally up to date. Some lingering values of the company remain. With the nice look of the centers, good curriculum, and gyms, you work in a nice place where you can exercise and feel decent about the material you teach. Depending on the management and location of the center, your experience could be better or worse. They tend to find good hires, but the best ones are often overworked and burnt out. If you work part-time, this could be a decent place to work.
Cons
Low compensation, no bonuses and promised bonuses not delivered, regular expectations/pressure of overtime work and non-job related tasks and with no additional pay, and market average compensation. Job roles can shift due to the company's ever-changing and last-minute initiatives. The owner and his #2 haven't been able to retain good management, so they often get over-involved in projects smaller than their roles, causing underdeveloped staff to prematurely step into roles without training and outside their scope of work.