It is easy and highly-scoring, the only reason of low marks in recent years is that candidates take it really lighter considering their own subject. CSS main apne 'speciality' subject ko unintentionally he candidate light le laita hai. but the myth of it being difficult just because we have to prepare marketing, management and finance is only a myth! the topics covered from these subjects are kind of 'kiddish' for business grads. the only technicality is FINANCE! it includes a lot of stuff like banking and finance, business finance, corporate finance, and a very little accounting. though they are not in detail, but they are a lot to be covered. thats why finance has 40% or 30% weightage in business admin. so if you are good in finance, it is highly recommended to opt for this subject!