Hey Nelie
Yes - I love my Sony Reader. I have the PRS-505 (from 2 years ago). The new models for this year - PRS-350, PRS-650 and PRS-950 are awesome. They use brand new touch screen technology. Combined with the eInk technology, the screens look fabulous. Some people are surprised that the screens are not backlit - but they are a true book-like experience, the screen is like paper! You can read it in bright sunshine, no glare, easy on the eyes, etc. Of course, you can't read it at night - it's like a book! The eInk techology also delivers exceptional battery life. A backlit device can run out of power in less than 10 hours, a Reader digital book lasts TWO WEEKS between charges - seriously!
The models are all very light and easy to hold. I tried out my coworker's iPad and it was WAY too heavy for my wrist.
The basic differences between the models:
All models have touch screen, eInk technology, built in dictionaries
PRS-650 adds a bigger screen, ability to play music files, expandable media (memory stick, SD)
PRS-950 has a bigger screen and wireless
If I were to buy one, I'd get the pink PRS-350. While I do think playing music is handy (and I have done so on my PRS-505, it's not a deal breaker). With the ability to store over 1K books, I don't really need expandable media. I don't really need wireless.
I have used my Reader to check books out of the library! My library system - San Diego County library system is participating. The selection is honestly pretty spotty right now (very random!) but I know as more books are digitized, more and more books will be available. It is VERY easy to find books, check them out. Another big plus - no late fees! After 2 weeks, the books just poof.