First: New Oriental
The overall strength is strong, but there are more new teachers. Mainly large classes.
Second: new channels
I heard that the new channel is also good. After all, Hu Min used to come from New Oriental, and he also had a group of overseas teachers teaching in small classes.
Third: global IELTS
Global IELTS training centers all over the world adopt the way of joining, but the existence of joining can not guarantee the unified teaching quality of global IELTS national outlets.