I have to disagree that they work fine with graphics, especially in low light conditions. It's downright terrible in my opinion. I have a kindle version of Calculus: Better Explained, and it's unreadable on my Paperwhite. I have to resort to the kindle app on a tablet or PC.
I actually agree with you. I was being sloppy. Kindle format can work fine with photos/graphics on a tablet and even a smartphone. (I've actually come around to mostly liking eguidebooks because they're right on my phone and I don't need to xerox the relevant pages to carry around.) But, much as I like my Paperwhite, it's really just for reading text.
