Ranked in these QuestionsQuestion Ranking
Pro Large number of languages supported
Codechef supports an impressive number of languages in it's platform. More than 35 languages are supported, all with several problems and challenges and contests.
Con Interaction inside the community is limited
The Codechef forums are not very active and they are the official way of interacting inside the Codechef community. Other than the forums, the only way of interacting with other members of the community is through the comment sections of different problems.
Con It's young age makes it not popular for recruiters
Codechef is still pretty young especially compared to it's competitors. So it's not very popular with recruiters yet.