Mine arrived last Thursday but I didn't get a chance to open it up until Thursday night (dang the kids and their commitments
) and I love the big screen. Of the three Kindles that I've owned this one has the best contrast. I don't like the poor PDF support and no left hand buttons (I'm a lefty!!!) and the keyboard. My favorite keyboard was on the Kindle 1. Until TOC and links are supported I'll be converting those PDFs to mobi format.
My suspicion is that Amazon won't improve the PDF support because textbooks will be released in Topaz. Since Topaz hasn't been cracked (yet) it's the most secure format for textbooks.
The K1 went to my Mom when I got the K2. I'll be keeping the K2 to use when reading on the go.