Maureen tutors me math. She is very nice and make the math easier to be understood. I like her.
Walter has a number of real life experiences to draw on which helps him get his teaching points across. Very well educated person who can anticipate the next problems that will arise based on learning style, knowledge, depth or knowledge and prepares you for those obstacles.
Alfred certainly seems to have profound understanding of the subject matter (calculus-1) or at least that's the immediate impression I got from the first lesson session.