PDFs tend to be hit and miss on ereaders. On my Android ereader some PDFs look awesome, some require far too much zooming and scrolling, and others won't load at all.
I liked the idea of using the Kindle for PDFs, but it's just not practical. I read them on my HP Touchpad (running Android). That's got a 10" screen, and is very good for reading a page at a time, without having to scroll around or zoom.

