I have a very old (cheap) Nook and have a tablet which I use to read the books I buy from Amazon.
1. The particular Nook I have doesn't have a full touch screen - very annoying
2. However, the Nook I have (B&W) - the battery lasts FOREVER!
3. I really prefer the ePub format
4. I really prefer the full touch screen of the tablet
5. I like how I can easily share books with family members via Share in Amazon (sister has a Fire)
6. Amazon makes it soooooo easy to buy books (maybe too easy)
I am looking at a way to take the books I buy in the iMobi format and convert to ePub, so that all of my books are in the same format, but I haven't done a lot of research on it.
My sister has the Fire and she can't figure out how to transfer files to/from it - now she isn't a computer expert either, and (in my opinion - being the older sister and a computer programmer) I believe she gives up too easily on anything remotely "technical"...
my 2 cents.