Revised syllabus is bit more complicated and advance level. if you got sound knowledge of accounting concepts, financial statements, ratio analysis, financial management and performance management then go for it. it will give you easy scoring as most of the paper is analytical.

Preparation time depends on your academic background. if you have proper "professional" accountancy background, it will take around 15 days. the course is lengthy otherwise if you just went through a book or two during your business studies. it certainly will demand much more time like few months.