It´s a good page, indeed, since it gives the "theorical basis" in a very passive way for the candidate (e.g., videos, material is very "prepared", etc.) This for sure will make you save some time vs. the classical reading of Case in Point or other classical manuals.
However, you have the risk of having a too-theorical preparation. Once you have a basis, the most important thing to do is multiple cases, of different:
- Types: being the top ones profitability, pricing, market entry, M&A, etc.
- Styles: not referring to the misleading concepts of interviewer-led, etc,. but there are many case structures worth seeing at least once
- Even industries!
Hope it helps!