The Times is a small class, usually 4 to 8 people. EF also has one-on-one classes, but there are more than a dozen small classes.
EF can listen to the audition, and Times seems generally acceptable (only if there are vacancies in the class), but Times generally does not allow parents to enter (except open days), so it does not disturb.
Thames is eight people who have passed the exam and have similar real grades (you can also transfer to another class). Of course, you can choose a better class. Generally, he suggests that you choose a similar class, and so does EF, but it is not so harsh and you can meet good classmates.
Time homework says a little more.
Teachers and teaching assistants are good.
EF is very happy to study, and his classmates are also very good.
It will take a long time to see the effect of the two, more than one semester, but English ability will be improved, language sense, personality, oral and communication skills will be improved,
If you want to improve your test-taking ability quickly, choose something else. I heard that there are sailing boats or something (I haven't been there, for reference only)
It's best to audition by yourself, I like it best!