For me the Quantitative Aptitude was taken by K.G. Sekar sir. The shortcuts sir used for solving problems helped me a lot. Syllabus was covered in a way that each and every student understands the concept. English was too good, in a short time sir explained grammar and many shortcuts. I attended the mock interview class for IBPS PO, which helped me to do well in the final interview, which I thought would be difficult. Overall my experience with CSB was great.