Agree against working for Berlitz.

Not saying my experience was particularly bad there, but I was never sure when or even if I would be working as a part time teacher, I just had to keep hours open for them, and better pay can be found elsewhere.

I worked for Berlitz in Japan for a good five years, and hopefully I'll never have to go back just cause private students pay so much better, and they're thrilled at the more reasonable cost of lessons.