I find it buggy. I have the latest updates, but I've noticed one or two small things that aren't expected behaviour. When I change my desktop wallpaper, for example, it sometimes doesn't remember when it boots up again, and defaults to a previous wallpaper or even the OS X default (the blue galaxy one). And I experienced an odd context menu behaviour which I've since fixed; it placed Photoshop twice into the right-click context menu. Have you noticed little bugs?