Today I came across a feature that the Edge got right. The main reason I noticed is that everyone else gets it wrong.
One critical feature that most ereaders miss is annotation. To be more exact, the missing feature is how to get annotations off the ereader. Okay, it's not important for the basic models, but once you have the ability to edit an ebook on an ereader, what is the value of that editing if you can't use them elsewhere?
When using the Edge, you can save the pen based annotations (and the page they're on) as a PDF. You're also supposed to be able to send that PDF as an email attachment, but that doesn't seem to work yet. (Let me fiddle with that some more.)
I'm also pleased with the quality of the inking. BTW, now I understand why the Edge has a large bezel. It gives me extra space to rest my hand while I'm writing. This helps me a lot, because my penmanship was never very good to start with.
So long as I'm on the topic of inking, I'd like to point out that you can also create "journals", which are collections of handwritten notes that aren't attached to any ebook. With a single button press, you can switch between having an ebook and a journal on the epaper screen.
I'm really impressed with all the writing options. You can write in 6 different line sizes, 5 different shades, and there is even undo and redo options. I think the best comparison would be a b&w version of MSPaint( but that's not an exact match). About the only option not offered is typing a piece of text into a journal instead of writing it.