I came up with a list of questions when I started this review, but I'm not going to answer all of them. Now that I've used the Edge, I don't think some of the questions are worth answering because they're redundant or invalid.
How is the Edge and a laptop used in comparison to the same laptop and textbooks?
I could not comfortably use the Edge with my laptop. I did try, but it seemed to me that the Edge and my laptop both needed to occupy the exact same position on my desk. Shifting one to the side, or propping one on the other, was just too awkward.
But that's okay. I think that the Edge by itself is a reasonably good replacement for a laptop & a paper textbook. It worked (for most things). Sometimes I need to type, and the onscreen keyboard just doesn't cut it.
BTW, while I think the Edge can replace a laptop+textbook, the same does not apply when you add a second, third, or fourth book and use them all at the same time. I think you're going to want to keep those extra books separate from the Edge. But, I did find I could use the Edge with the extra books, and it worked well.
Could the Edge be a complete replacement for a netbook?
Maybe, but it would depend on how you're going to use it. If you want to use the netbook as a smaller version of a laptop then the Edge won't suit you. The Edge is intended to complement a laptop, not replace a netbook. You use the Edge in ways that you can't use a netbook. Also, I think you'd be better off with a laptop+Edge than a laptop+netbook because of how the Edge complements a laptop. I think it would be more productive.