- The e-ink screen is great for reading. The feeling of ink on paper it produces cannot be replicated on any other screen. Not to my satisfaction.

- The microcontroller is so weak that you cannot add crappy features like more powerful e-readers are wont to do. This produces minimal distraction-free UIs. No messaging, no browsing.

- The form factor is the biggest win. It fits in a pocket and is great for the 5-10m you find when traveling or waiting somewhere. I cannot carry e-readers that way.

- It is great for fiction, and text-heavy non-fiction: history, philosophy etc. Stuff with a lot of images, tables, code blocks etc ... nope.