Dottore,
I have exactly that Sony Reader.
So far it has been great. I use it daily for about 30 min. in bed before sleep. Batteries last me about a month before needing charge. Charging is through USB or you can buy an external charger. The screen is not illuminated so you need some kind of external light. I do not think outdoors reading should be a problem since it is more like a book than a computer screen.
There are a lot of books without (or expired) copyright through Project Gutemberg (
www.gutemberg.org). Also you can convert any txt or Word document and most pdfs into Sony Reader format using conversion software (don't recall which one I am using). You can find current books and book collections over the internet in txt, Word or pdf format, although there are copyright issues...
You can choose between 3 font sizes and can bookmark pages, but nor take notes or highlight passages.
The greatest drawback for me so fat is that there are few books in Sony Reader format so I need to get the txt, Word or pdf and convert it (it takes just 1 minute but would rather not have to do it). Also there are minor conversion errors and/or mistakes in the downloaded files.
I think I paid $300 at Borders last august for mine. And yes, I am a compulsive reader, and this is a great way to reduce luggage when traveling (usually pack 5-6 books for 1 week trips to the beach).
Do not hesitate to ask me if you need more info.