It's lightweight, but more importantly, it's just as usable as the more bloated distros, if not more so because it's also so lightweight. On an old P3, 256 RAM, and terrible on-board video laptop, I was very surprised when I could run a YouTube video at the standard quality without the video lagging, and I might even be able to watch higher-quality videos. I had issues running even 240p video in Ubuntu. Not so anymore! I used to have to start the flash stream, minimise the window, switch to another desktop, then start VLC to watch what I wanted to (normally, assorted anime's).
Furthermore, beyond the basics, there are very many little bits of it that make me happy. The way the title bar displays the button as small, hiding dots is great, in my opinion, the date and time in the bottom are already in the format I had wanted them in... the black style is great (much of this has to do with black pretty much being my school colour, with gold accents)... Conky is great, and I'm going to spend a good chunk of my weekend weeding through the possibilities on the thread... Even the cb-fortune bit that pops up makes me love #! that much more...
One of the reasons that I didn't go for Puppy for a lightweight distro was the flavour of the distros, and #! was every bit as flavourful as I had expected. (If you don't mind the expression.)
Sorry for the run-on sentence, and the lack of coherence, but... there ya go.
If you understand, the world is just the way it is. If you don't understand, the world is just the way it is. -- Zen Proverb