Peter Aleksander Bizjak

I think this is how UI libraries on the web should be like: simple, small and straight to the point. No overhead. Really well done!

This looks extremely useful: the site itself looks nice and the customization is there. Animations are smooth, there's plenty of them, and it seems like they cover pretty much everything you'd want/need to have. Lastly, which I think is the most important, copy-pasting CSS makes the whole thing very accessible.