To understand why candidates aggressively seek Schweser notes, one must first understand their value proposition. The official CFA Institute curriculum is comprehensive, rigorous, and voluminous. For a Level 1 candidate, the curriculum can span thousands of pages of academic textbook-style reading. While thorough, this material can be overwhelming and inefficient for exam preparation.
To complement your Schweser notes, consider the following study tips: schweser cfa level 1 notes free