I definitely recommend GMATinsight for scoring high on the GMAT exam as the teachers, Bhoopendra sir and Sushma maam have helped me score the best that i could. Sushma maam walked me through all the concepts of sentence correction, the section i had been struggling the most in while Bhoopendra sir helped me a lot in Data sufficiency. I scored a 730(Q-49, V-40 , IR-8) on gmat because of all the help i got from the classes.