[alecdibble]

I felt it was good when it first came out. After using the Kindle Paperwhite with touchscreen, it was hard for me to go back to the DX.

One of the most annoying parts about the DX was the PDF zoom. If the margins on your PDF are too big, the zoom doesn't function to remove the margins and zoom in towards the center. If I remember correctly, it zooms towards the left, leaving right half of the page cut off and still fat margins. It was so bad with some textbooks and papers that I had to go manually cut out the margins of the PDFs using an editor.

You can always read PDFs in Landscape mode, but that tended to be clunky on anything with 2 columns. In landscape mode, 1 page will become 2-3 "pages" that need to be traversed back and forth to read the separate columns. The Kindle caches the next page of the PDF but not the previous, so using the back button on PDFs could take a little bit depending on how big the PDF file was.