No guilt here!
Once I got my first reader over a year ago I was hooked. I bought it for a plane ride originally. Because of my reader I read so much more now. How else can you go from book to book in seconds no matter where you are?
I didn't read as much with books because you have to go to the store and browse and buy. Plus I'd only buy one or two at time it's just a pain in the neck. I do buy Recipe books still that is one thing I don't like as ebooks.
I've gotten a second reader since my first I did have a sony 300 I now have a sony 350.
There should be no guilt with reading.