I've been reading lots of query letters over the past couple of years (no, not just my own!) and this one is my favorite. Right up to and including the author's bio.
There have been lots of letters that made me want to read the book, and there have been a couple where I bought the book based on the query letter. ("Real Mermaids Don't Wear Toe Rings" just today, for example.)
But the query letter for A Comedy of Terrors was wonderful. I still remember it three months later. When I'm trying to write a query letter, it's this one I think of. This one I judge my query letter on. No, I don't want to do the same thing, but I want to figure out why I love it (probably voice) and do that in my query letter. So when I'm saying "Not right yet", it's because of the query letter for A Comedy of Terrors. (And boy I hope this book gets published, because I really, really want to read it!)