Three of my betas have finished the book so far (let's hear it for speed reading!). They've given me a few tips, with promises of more in depth critiques to come. I'm actually excited! First off, no one has said "Oh wow, you stink!" Second, even the small tips they've given me so far have been helpful (and very true, when I look at it).
I told Theo today that I'm not sure if I'm disgusted or happy. Disgusted at myself for not thinking of most of this stuff earlier, and happy that I AM thinking of ways to expand/hone my book.
AND, I bought a purple pen to do my edits in! Purple trumps all.