I think the Kaplan course
can be a valuable tool for people who a) don't have the discipline to force themselves to sit down with several books and really study for the exam or b) have tried self-study, but need someone to explain the various concepts in greater detail than is given in books.
If you can buy study books (I used Princeton Review
, Kaplan Premier
and the Official Guide) and really sit down and devote yourself to spending an hour or two a night to learning - and practicing - the concepts and strategies in the books, save yourself the $1300. If you need the structure of a teacher, a classroom and homework, you'll want to make that investment.
Fortunately, for you, there is time. You can try both methods if you want: take a full-length practice test now, study study study for 3-4 weeks and then take another practice test. If you don't show significant improvement, take Kaplan
's 1-month program.