Highly recommend Manhattan Prep and Jonathan Schneider!!

I took Manhattan Prep's GMAT courses last year. The syllabus was very well designed and the instructor, Jonathan Schneider, was extremely skilled and up-to-date on the latest GMAT trends/topics/question types. Coming from Engineering background, my biggest weakness was in Verbal section, for which the combination of Manhattan's text books and CAT exams and Jonathan's instructions were extremely helpful. From information on the algorithm that Official GMAT uses to calculate the score, to common mistakes that people make in different question types, to smallest details on how to physically and mentally prepare for the exam, you can ask or email Jonathan whatever you want and he's always there to answer with tremendous resourcefulness and patience, even far after you're done with classes. Two month after I finished my classes I got 710 in my first official GMAT try. I build upon the solid verbal foundation that Jonathan and Manhattan's classes had created in me to study more, and eventually in my third try I got 760 (99th percentile) with a verbal score of 44 (98th) percentile. I highly recommend Manhattan and especially Jonathan's classes to whoever is shooting for a 700+ or score.