My son attent 5 lessons (LCM course, at Yaumatei) last year (1-to-1, $250 x 5). I don't like the environment, vy small. My son didn't like it, maybe too boring because 1-to-1 lesson.
I haven't been to their Wanchai centre. So no comment. My son's teacher (last year) is a Chinese ABC. She is vy nice. But my son didn't have significant improvement, because he is vy shy, and he only took 5 lessons.