Composite Alevels

Heyy anyone who appeared or will appear for composite Alevels pls let me know how do you guys study and like what made u take this decision.

By "composite Alevels", are you referring to the practice of taking AS and A2 exams in a single session, at the end of the second year of study? If so, it's what students in England do anyway (as A levels there consistent of a 2-year course with a single set of exam at the end).
Or are you referring to something slightly different?