Just got my Kindle DX so I am giving first impressions of it in PDF mode used in conjunction with Google Books: 1) This combination is very useful. 2) Page turns are very slow -- as in 10 seconds to render a page turn. 3) The result has a slightly blurry "photocopy" appearance. 4) There is some charm in seeing an old book in its original formatting. 5) I'd rather read the same book in PG mobi format if it existed. 6) Personally, I really like the larger format of the DX and the heft of it -- its more like reading a high-quality hard-cover book, whereas the smallish Kindle 2 would be like reading the Norton's paperback edition. Personally, I cannot imagine reading a book in a tiny cellphone type format -- but you'all have heard those words from me before! 7) The DX works very well for PDF technical documents, and I think it may very well find a following among colleges and those (like myself) who read lots of technical documents. Obviously technical documents do not have the "slightly blurry" aspect of Google books since that is just an artifact of the Google book scanning process. Also page turns on technical documents only take about a half a second. 8) I would think Amazon will now start selling some books in PDF format or other fixed-format because some publishers, of cookbooks say, would rather just do that rather than having to reformat a book to support MOBI unfixed-format. In summary, I think this combination is a potent competitor to PG but not a knockout, and I would think that the price is the big stumbling block, NOT the size.