I really like my kindle fire. I just got it for Christmas and it is a lot of fun. I especially like watching Netflix on it...It has some great games you can play on it as well...and of course my books are on there.
I don't have a Kindle Fire. But I ever considered to buy a simple Kindle to read books. It is fine to be black and white because I think it will be more like the real books and it will be less harmful for my eyesight.