All in All a nice new lineup. The 300 is going to be great for the new crowd, the 600 hopefully a pleasing hybrid of the best of the 700 and the 505, and the new daily edition.... well, I'm not sure where that fits in, but it's nice just the same.
The built-in library support is great, though the NYPL misunderstanding had me shaking in my boots. As a legitimate NYPL cardholder I know how difficult it can be to get popular titles, and despaired at the whole world getting free access.
One issue that I hope that have fixed in the new readers, and will retrofit to the 505 is multi-library support. With the 505 you cannot read books checked out from two different libraries - it can only support one authentication source at a time - the other books will be unreadable on the reader. I'm not sure if it's specific to pdf, epub, or both, but it can be a pita.
Buddy