I hadn't watched it in about 1 and a half years, now, and just finished it for my maybe 20th time.
It's fast, extremely witty, and the voice acting is absolute perfection.
I had numerous genuine burst-out laughs from the slathered-on sarcasm to the meta jokes. They even have jokes in there for adults to get.
This whole movie is absolute perfection. I was quoting along with it from the first few scenes!
I've seen the video of how the movie's original concept was totally different, and it went through hell and back to finally become what it needed to be: The funniest Disney movie of all time.