Kindle as editing aid

I've just found something else I can do with my kindle - I saved the first three chapters of my ms as a pdf and sent it to my kindle. It was fun reading it as though it was a published book! But wasn't just an aid to fantasising about being a published author - it also gave me a way of reading an over-familiar text through fresh eyes. I picked up things that grated and pulled me out of the story that I hadn't noticed before, even though I've read it through loads of times. Definitely a useful exercise.