I am thinking about buying a digital voice recorder so I can record lectures and then transfer them to my computer. I'm looking at an Olympus DS 330, it has all the features that I would need. Has anyone used one of these before? I did very well in class last year without recording lectures, but I know this coming year will be harder. And I'm thinking that studying the reading material, my notes, and listening to the lecture again, may help me even more. Has anyone used this type of thing to help them study, and did you find it effective?