I'm looking for a device that enables me to read and annotate electronic books and papers (annotations directly on the page or with a virtual Post-It). I would also like to use the device for general note-taking, that is, as a replacement for paper notebooks.

I'm particularly interested in the Kindle Scribe but I'm also considering an iPad, because I already use a Mac and an iPhone. Unfortunately, I cannot try them out myself in a store around here.

Are any of you using these devices for note-taking and reading? Do you like the experience? Especially compared to working with plain paper. What works well and what doesn't? What should I be aware of? Can you read A4/US letter-sized PDFs comfortably? Is there something else you can recommend?

Thank you!