How do you define a good tutor? After all, a complete file, which describes countless advantages and many years of experience, does not mean that this is true. Since the work of these mentors is quite expensive, the requirements for them are higher. Don't be afraid to ask him for feedback from previous students or even their phone / email number. Read the reviews not only those that he himself sends, but also look at the forums. Also ask what methods he uses in teaching. A good and experienced person does not ponder this question.