A "Best" repack covers every single section of the workbook. This includes:
Volume 2 typically covers advanced practice for all four exam papers: A "Best" repack covers every single section of the workbook
Aimed at students preparing for the HKDSE, typically focusing on the S4–S6 level requirements. A "Best" repack covers every single section of the workbook
The best repack is error-free. Many amateur repacks contain typos or misaligned answers (e.g., answer for question 12 accidentally placed in slot 13). The best version has been peer-reviewed or cross-referenced against multiple original editions. A "Best" repack covers every single section of the workbook