"It is best to experience the class, so as to know which one suits you, and learning will get twice the result with half the effort.
I also study oral English in a class, which is taught by one-on-one foreigners, and I feel ok, because I think this telephone teaching mode is quite suitable for me. The most important thing is to have the opportunity to speak, and it is one-on-one learning.
You can also experience it if you are interested. "