on 17 December 2013
Bought the complete set of Manhattan GMAT prep books, but ended up using only the quantitative books and the roadmap. In my opinion, the Manhattan GMAT books are superior compared to other GMAT prep books (e.g. Kaplan) - all concepts are explained step-by-step and, when you put some effort into it, provide you with a solid understanding of everything GMAT-related. Very helpful were also the online Manhattan GMAT resources, including GMAT simulation tests. Full access to these materials required only one access code out of the ten you have, which increases the resale value of the set.
Using these books in combination with the Official Guide for GMAT Review 13th edition (if you buy the Manhattan books, be sure to buy this book as well - the Manhattan books continually refer you to questions in the Official Guide), I went from 640 in the GMAT preparation tests to 720 on the official GMAT. I could probably have scored higher if I would have had more time to prepare (my full-time day job didn't leave a lot of time for studying), but I would nonetheless recommend everyone who plans to take the GMAT to consider using the Manhattan GMAT prep books.
on 22 February 2014
Perhaps it is too premature to write a review, however first impressions go a long way in my books (no pun intended!). Having reviewed the first book geared towards Quants has affirmed that the other books will have the same detailed reasoning (at times from grass roots!). This is seriously money spent wisely for me and along with the OG GMAT 2013, it will put me in good stead for my GMAT preparation.