Yup, this is what I do. Battery lasts forever. Since I get most of the books off Project Gutenberg, there wouldn't be any slick wifi transfers for me anyway.
There is a “send to kindle” function which allows you to either use a desktop application, or set up an email address you can send .mobi files to!
Highly recommended if you get tired of plugging in - thats why I swapped from my old Kobo to a Kindle.