I read a good many reviews before I bought the PRS-600, many of which raised valid points. Yes, the screen is too reflective, yes, the contrast is not as good as the PRS-300, which my wife owns, but, it's still great to use. I have no real problem reading with it, if there's too much glare, I change the angle slightly and Voila, it's gone. Anyway I'm hoping that the screen protector that I'm about to fit will help.
In the end, the deciding factors were the variety of formats it accepts and the fact that I love touch screens, and the touch screen on this is brilliant. It's responsive and accurate and I'd trade the slightly lower contrast for it any day. Selecting books, turning pages, adding bookmarks, accessing the dictionary, all done quickly and easily with a tap or swipe of the finger, brilliant.
Yes the software is buggy, but I only use it for putting DRM ebooks onto my reader, for everything else there's Calibre, a free download, that loads books onto the reader with no problems and even converts them from one format to another.
It may not be perfect, that' why only 4 stars, but it will do until something perfect comes along.
Now, if I can only find a touch screen MP3 player that's not an ipod Touch and doesn't cost an arm and a leg.