The Good:

The Good:
If you are lucky, you have a professional teacher who is up-to-date with the teaching methodology. The books provide a step-by-step progression.
The bad:
Mandatory Big-Class-Sessions (total waste of time); way too pricy if you shop around; management won't respond to complaints about teachers' behavior; there is no teaching observations( I was there for half a year and saw none) and Teachers are completely free to do whatever they want. no quality control. pair-work and conversation is not emphasized and they still rely on the Grammar-Translation methodology of teaching like in the Ming Dynasty! No attention to acculturation. Offered cultural courses (yoga, Tai chi, calligraphy) are too expensive and happen to be once a week for a short time!
Conclusion:
It is just famous and maybe because of the glorious past they had in lack of competition. I won't continue there again.