Just finished the GMAT this morning and got a 730 (96%) - Q49 (87%) and V41 (92%). I was not able to attend a Manhattan GMAT class but I purchased the strategy guides and practice tests and found them to be very helpful.
I found the math on the actual test to be easier than the MGMAT practice tests but the verbal to be much harder. I consistently scored in the 99th percentile on the verbal sections of the MGMAT and the official GMAT practice tests but struggled to break 80% on the practice quant sections.
Practice tests are as follows:
MGMAT1: 720
MGMAT2: 730
Official GMAT1: 720
MGMAT3: 710
MGMAT4: 740
Official GMAT2: 740
(Split the books and tests with my wife so only took 4 MGMAT tests)
I had taken another company's class about three years ago at work but found it to be useless. I HIGHLY recommend Manhattan GMAT. Now I can go back to not caring about how to find the surface area of a cylinder.
Thanks,
GMAT Forum