Good things: large number of pdf available for any subject you want to learn I recently read clojure programming explain with concept with examples, diagram & website link available from which you can downloads things I like that. programmers, digital professional, data scientist, those who looking for competitive exam ssc, banking can get benefit from this.
Bad things: lack of videos I not see more video available on this website. its focus more on technical person like programmer and data scientist and digital expert those who political or psychology student this is not for you.