My best bet would be to wait a bit to see if something better comes along. Things are finally getting developed in that market, and I would say that it might be too much of an investment at the moment.

Though, many people seem to like them. One thing that worries me is the capability of transferring your ebooks to another device if you so wish to upgrade... I think that at the moment you're stuck with the ebook on the device you bought it with. I'm not certain.