I didn't try it. No. I like my speed and blurlessness too much. I guess I loaded it in more out of curiosity than desire for it. I don't expect I'll start using the 2.2.1 until people begin to write roms/themes for it.
However, I am lurking around here looking for something new to try out. Thinking of maybe taking a look at RubiX 1.6. Post whore, Rom/theme whore. I don't care what people think of me.
Have a good day, my friend.
Have you tried SSX by ChevyNo1? I am running it and like it a lot thus far, it is themed with blue, similar to the Galaxy S. Also, it is update.zip so you can try it out by installing it over your current theme and while there be a few extra apps, if you like it, you can freeze or delete the extras or apply it over a clean install.