Also, you can change the Font size to adjust to our "more mature" eyesight and leave the glasses off. The battery life is measured in weeks. The volume of books you can store on it is in the 1000's. The case you put on it has a magnet on the cover, which turns the unit on/off when you open/close it. When you open it, you will come back to the last page you are reading. You also get the ability to click on words and have a dictionary pop up for explanations, a page numbers, percent completed, and estimated minutes remaining to finish.
Here is my favorite part. I bought my first book when I got it, and 85 books later I have not bought another.
There are websites like http://www.dailyfreebooks.com/ where you can get them for free, and you 'buy' them for $0.00 and own them.
And if we are REALLY good friends, I can 'loan' you my books for a 14-day period so you can read them too.
Also, you can 'check out' books from the library for 14 days as well at no charge.
The 3G is nice because the you can get books wherever, and it doesn't cost you. (You pay for that when you buy it)
The Wifi is fine. The trick is to download a bunch of books when you are on Wifi, and then you always have something to read even if you don't have wifi. Ha!
Also, you can pay to not have the "Ads". $20 upcharge one time. However, the "Ads" are only shown when you open the cover, and you can swipe right past it. I thought I wanted to pay the $20 immediately, didn't and now I don't care.
Highly recommend the Paperwhite/ Voyage if you can get one.
Paperwhite comes in several models based on year, so check that.
The Voyage has more backlights, totally flat surface, and slightly smaller.
Call me if you want more ramblings. :)