I'm just afraid you're going to freak the poor guy out. I'm in the top 10% (maybe the top 5%), and so are members of my study group. We did not do 100 exams. We *did* do every exam we could get our hands on, but it couldn't have been any more than 20 over the course of both semesters. Obviously, what LilOneL did worked, but don't think that you *need* to do it. But while we're on the subject of practice exams, I want to again stress how important I think it is that you not only do the exams, but that you *study* any sample answers or going over the exam with your professors. Why? This gives you insight into what answer your profs want. And you'll be amazed how many of your classmates won't do that extra step (which I consider to be the most important step).
How much does LEEWS cost? I couldn't actually find a price on their site. I am talking about the program or whatever you guys are talking about.