The White tiger and white eyebrow systems

Has anyone had experience with the White tiger system and what was it like. I heard that it suppose to contain the essence of the wing chun system plus much more since it’s creator Fung Doe Duk was the eldist of the five elders and was responsible for teaching the other 4 Ng Mui, Pak mei, Chi sim, and miu shun.

Also is it true that the Bak mei style was designed to take advantage of the inherit weaknesses of the wing chun system?