How good are Mahler Slides and Practice Exams for STAM?

Has anyone tried Mahler slides for STAM? It is more affordable compared to the Study Manual and from the description in ACTEX, it is self-contained.

I won the Excerpts from Dr. Jim Daniel and they are really helpful. But I like increasing my odds of passing by exposing myself to other ways of seeing the concepts.

I also plan to buy Mahler’s practice exams by the time I finish the syllabus. Any feedback on these materials by Mahler is highly appreciated. :pray:t4: