First of all, don't try to take shortcuts in the first-level constructor exam. Any institution has the answer. Such a national examination is impossible. Are preaching answers, grades, etc. They are all liars.

Secondly, there are two kinds of training institutions. The first is an organization that cheats money by selling answers and other gimmicks. The second is to invest in institutions where teachers study teaching content. The first one can be directly denied, and the second one is based on your own learning. As the saying goes, the master leads the door and practices to see the individual. If you have no learning ability, I suggest not to waste money and time. If you have the ability of self-study, after summing up the teacher's experience, paying attention to the law and purposeful learning can save you a lot of detours.

I haven't heard of this institution you mentioned before, and I haven't been in contact with it, so I won't make an evaluation. You can visit their company, not the scale, but their teaching and research and teachers. If the teacher just invited a foreign teacher, he would give you a lecture for one day and fly away. I think such institutions can be abandoned.