A.F.
I love my Nook and that I get a free book every Friday (you don't get to select it and you have to remember to download it, but it is free). There is also lots of free and also cheap books available online.
My husband has the Nook color (which is how I got the original Nook, because we can't share as we both read at night). With the Nook color you can also get magazine subscriptions on it and play games ~ my son loves having a big screen to play Angry Birds on.
I love having access to all of these books and magazines, but NOT having them laying around my house.
If you get one get a cover. A friend got one for her son for college (so he could get some of his books on it) and did not get a cover. It was in his bookbag which got kicked on accident. Not good for the Nook...