Not as good as I hoped, unfortunately.
It's a fitting finale to the series, I suppose, but the writing is too optimist, too naive, and too awkward at times. The characters don't address each other as real people, or even as they would do on the show (and I've seen every single episode).
The settings are well recreated (the house, mainly), and I felt I was there with the whole gang. So, that's a plus. Also, it's funny and the themes are in line with the values of the show.
But there were too many callbacks to previous episodes, and that's the main problem of this book: the callbacks never cease!! It's there throughout the entire book. The characters are seemingly unable to stop referencing past events in their lives, and it makes the dialogue clunky and unnatural. I have seen the entire show, I know what happened, stop reminding me every single event!
The characters don't talk like they do on the real show and that's a shame, because the author has obviously an immense knowledge of Bewitched and his passion for it shows throughout this easy-to-read book. I just didn't really enjoyed it, at least not as much as I wanted to.
It's still an interesting experiment, and something other Bewitched fans might enjoy more than I did. I just wished the dialogues were written better and felt more natural.