I just got my 1st semester grades back, and I am satisfied with my performance. I used the LEEWS method for my Contracts exam (only essay exam I had) and I made a B+!!! This is good for me, considering I only spent 1 day studying for the exam, memorized the elements of a contract and the elements of different remedies, and went in there with my LEEWS-style "toolkit" in my head (it was closed book) and my creativity. I made no Cs, so I won't get my money back! I believe this method is a sound way to organize your essays. Now "Getting to Maybe" tells you WHAT TO SAY, how to analyze, how to weigh in on different sides of an argument in a lawyerly way. You can't improve your analysis skills based on the LEEWS method (even though he talks about it and gives examples), but I really do believe you have to start with organizing your knowledge of Black-letter law in the way he describes.
I have a "performance improvement plan" which includes on-going LEEWS-style toolkit building (not only the day before) that sets my goal at 1/2 grade better in every class. I still have 3 semesters to hit that 3.5 (I'm at a 3.2 right now) so that I can make it into law review. Wish me luck!