I bought one for £29 then my wife bought another. The product is focussed on reading and avoids anything else.
I am the type of guy who likes to mess with the software, I have installed hacked firmware on my camera, NAS and PVR. I could root the Nook but it would be a shame to turn it into Jack of all trades. It is stripped of all possible nonsense that would get in the way of reading a book and better keep it this way. I'd rather not use it to play games of browse the net.
Battery life is supposed to be 2 months but normal use is less than that, maybe unused with wifi off could reach that. I cannot say how much it would last, I plug it to transfer files and is getting charged from time to time. Not a problem.
I am using calibre to find free books and transfer them, pdf files can be dropped through the USB cable, B&N has a decent store but I feel no need to use it.
I used to read a lot and I love books. I used to say e-readers are pointless and I'd rather read a book. Still, I am a bit of a geek and bought it because it is cheap. Well, is a joy to use and I do use it every day. The only problem I would find is the buttons on the edge are stiff but touching the screen does the same job (turn the page). Most of the time can be used with one hand, it is lightish, small enough to be taken anywhere and provide a choice of books.
Even if you prefer hard copy books, get an one, it is worth it. So many free books available, so easy to carry, so easy to use, you will find the occasion when is more convenient than a book.
It has some small problems but given the price it deserves 5 starts. If you'd rather have something better there is the glow model (just to read without a light in bed) or other manufacturers but stay with e-ink screens.