I had joined Chrome IAS GS Mains Test series 2017, and also had discussion for psychology answers with Mridul Sir…..the best part is the one to one interaction while he returns your the checked copies….he highlights your mistakes and gives you the better alternatives making it easier to implement….both for answer structure and content wise I found CHROME IAS highly credible for GS as well as Psychology and can be trusted for its mentorship rather just coaching.I gave my second mains in 2017