I bought my first Kindle this week and I have to say that I am quite impressed with it so far. It's the basic bog standard model, bought for £60. The battery life is extraordinary compared to mobile phones or laptops, the screen quality is more than adequate for the task in hand and the amount it can store is phenomenal.
It is true what people say about the special feeling of a real book but there are also disadvantages to paper books. For example where to put them- book cases are big, Kindles are small. When books replaced scrolls the replacement was almost total- I'm pretty sure this won't be the case for e-readers they will take a big chunk of the market.
I can also see how e-readers have potential to be very useful in a school environment- if the bulk of the textbooks children have to have can be transferred to an electronic device then they won't have to carry have their own body weight to school each day.
All in all it is already one of my favourite electronic devices.