I studied for the GMAT at the end of January and only had about 6 weeks to prepare as my decision to attend grad school was fairly last minute.
In a matter of weeks Ed got me to a point where I scored a 700 when I took the GMAT in mid March. He was very precise and clear when explaining topics and test taking strategies. He was always flexible and available to meet and willing to come to my house to work.
Overall it was a great experience and I ended up with a fantastic score in a very short period of time.