It’s been 24 hours since I’ve upgraded (via a clean install from a downloaded CD, as usual) to Xubuntu 12.04 (“Precise Pangolin”). So far, I’ve found everything working smoothly, including the post-installation procedures (followed via my own guide, which I’ll update slightly for 12.04 as soon as I can).
As there’s not much radically different from 11.10, I don’t think I’ll bother writing up a full-fledged review of 12.04/Pangolin. There’s some new keyboard shortcuts; GNOME’s Alacarte menu editor is now included by default; there’s a new login splashscreen; and that’s about all in terms of obvious (so far) features. If you liked 11.10, you’ll like 12.04, plus it’s a LTS (long-term service release) as an advantage.
More on the 12.04 release (including downloading it) may be found here: http://xubuntu.org/news/12-04-release/