Vege,
Stay away from them!
I was warned these guys are a little shafty through one of the grads from my english teacher training school having a nasty experience ie asking people to come in on tourist visa being told that they would get their Z at expense of agency only having to folk out themselves, high salaries (for which NON where paid) and longer teaching hours than stipulated on the contract. The usual stay away from....
I will try and track down my friend and get in touch with you,
Steph