For my daughter's first lesson with Lui, he decided to assess her conceptual insight into maths and how it relates to Physics!
This was a 1 hour session and she has her exam in at least 3 weeks! I felt he wasted time at the begining of the session!
The latter part of the lesson, he worked on the equations from her physics paper, this was helpful for her.
However, he seemed unprepared, lack of equipment!
I don't think he is suited to GCSE more A level or Degree level (concept theories).