I second the Sony Digital Paper system. I’ve had mine for 3 years. I had been looking for e-ink display for years, before the price came down on the Sony produ

I second the Sony Digital Paper system. I’ve had mine for 3 years. I had been looking for e-ink display for years, before the price came down on the Sony product. Completely satisfied. Also, has 10g memory. Well. There is one thing I wish they would improve. The stylus lets you mark the page, and a search feature lets you search the document for only two hand-drawn marks—asterisk and star. I use a set of 9 simple margin marks when reading large documents. Wish I could add custom marks.