Having just recently seen the movie, allow me to squee over this. Especially the end, because while I did like the little touches of other characters in HOLiC, it felt a little same-y, while the end could only have happened with Watanuki and Clow.
I'm also rather enamoured with Watanuki becoming babysitter/nanny/older brother to human!children Mokona. Again. You seem to like that situation. Not that I'm complaining, as it's an absolutely adorable image.