My GF has a Kindle and absolutely loves it.

I have a Kobo. I love mine, it's handy on the train and reading in bed. You can only download from the Kobo store, so can be limiting as they sometimes take a little extra longer to the newest realease of my favourites authors. It charges via USB cable and the battery will usually last a whole book without having to re-charge. Kobo was initially bought out Borders, even though Borders have gone, you can still download direct from Kobo. The Kobo originally came with 100 hundred books already pre-loaded, mostly classics. Not sure if this is still the same now that Borders here are no longer trading.
I do miss having a 'real' book, and still quite often read those. I also use book stores for my Kobo shopping list. Go in a browse and then come and download.
They are quite a bit cheaper than the 'real' thing most of the time.