I have a kindle colorsoft. I send my chapters to my kindle in pdf format and then I make all of my corrections on it. I like the colors on the colorsoft, but I've also done it on the regular kindle just as easily. It's just not as fun because I'm an office supply whore so the colors make me feel like I'm using a real highlighter (or something equally dumb). Easy to search the manuscript for whatever I need to fix by pulling up the notes on my kindle when I'm done.