Linda, IVY School is a franchise and each one is owned by different managers.
Can't generalize on how you will be treated. My best advice is as always: to come over here on your own money and check out several schools. Work for them for a few weeks and if you like the conditions sign a contract that you agree with after discussing with other foreigners.
People get burned and intimidated because they are not prepared to be tough. The owners are often quite tough. If I don't get paid I don't work. I have never had a late paycheck in 7 years working in Korea.
The managers can smell fear.