After having the kindle since it was first released in the UK, I can honestly say that I am still using it to this day. With some technology you buy it, use it for a couple of months and then the novelty wears off but this hasn't happened with the kindle. I can also buy new books for it and find it easy to use when travelling on the train rather than having to carry a heavy book about.
For browsing the internet it is quite slow but then I didn't buy it for that. The e-books in the kindle store are reasonably priced and there is a good variety for all.
The battery life is good, lasting a few weeks. The screen is good for reading from not giving me eye strain and the kindle case, which I purchased shortly after is a god send for using the kindle in the dark as the light which is part of the cover is positioned in just the right place to light up the screen adequately.