This guide provides a detailed examination of the MITRE ATT&CK evaluation methodology, specifically focusing on the Wizard Spider and Sandworm threat groups. It outlines the challenges organizations face when evaluating endpoint security solutions and emphasizes the importance of using MITRE's testing methodology, which objectively assesses these solutions against simulated attack sequences. The evaluation does not rank or score vendor results, instead offering raw test data for buyers to interpret based on their unique needs. The guide advises on how to incorporate MITRE ATT&CK results into vendor selection criteria, highlighting that endpoint protection is critical but should not be the sole factor in decision-making. Additionally, it discusses the limitations of the evaluation, including its focus on endpoint protection and the exclusion of other important telemetry. By providing context on detection capabilities and methodologies, the guide aims to assist organizations in making informed decisions regarding cybersecurity technology.