Over the course of two years, I've taken 6 AP prep courses at M&E: 

1. Calc BC, 
2. US Gov, 
3. Physics C Mech, 
4. English Lang, 
5. Spanish Lang, and 
6. World History. 

I ended up scoring 5's all all but World (which was frankly affected by outside factors during exam day). The facility is nice, quiet, and not crowded at all, and the instructors were responsible and approachable, ensuring that the students both understood the concepts taught and that the students had the capability to achieve their goals on the exams.
The courses lead up to right before the exams, allowing me to have these topics fresh in my head as I walked into the exam room.

I've also taken Dr. Li's SAT prep academy, which is useful and rigorous in the same way described above. I'm updating this review because actually, with the prep academy and a few attempts, I was able to grab a score of 1590 on the digital exam, a score I'm quite happy with and surpassed my own expectations.