i just came online to see what people had to say about this exact question! i'd love to see more responses. . .
not wanting to take any chances, i'm thinking of taking it about 3 weeks prior to the exam (my study time is 7 weeks). . .long enough that hopefully i should definitely be getting a passing score and if not i can make some real serious changes. . .but not so close to the exam that it doesn't really help to take it. . .i also don't want to get overconfident if i take it and get a great score; i want to be 'scared' enough to study a lot, right up until the exam. . .thoughts?