I agree with Macman, updating is very important. One other thing that cross my mind was protection (e.i. carrying case), when traveling with your iBook, take care of the it, because you can easily scratch it. I was so careful for the longest time with my iBook, then I put it in my backpack without protecting it, and my books scratched the surface of my iBook like mad. Now, I don’t care what my iBook looks like, dumb books.