I have upgraded to ubuntu 11.10 oneiric ocelot yesterday from 11.04 hear are my thoughts on it.
- The interface has been polished and the Unity interface is usable now
- I like the new login screen with its smooth animation. But some how when you lock the machine the old interface is visible
- The lock screen animation is much smoother now
- The icons that have been used look much nicer and cleaner
- search inside unity works and their no lag between pressing the windows key and the unity menu opening up
- The new Empathy and Gwibber looks really nice
- The new software center is really nice and easy to find applications
- Thunder bird that is shipped with 11.10 crash when you click compose new mail button
- Gwibber randomly crashes
- Gwibber has this funny issue via if you scroll the items randomly repeats and its not easy to read or see whats past the first screen
- Gwibber has issue when you re size it crashes
- Empathy crashes if you change the theme
- Its not easy to expand the new software center install application categories
- Annoying zanity notifications for new email that i seem not be able to turn off.
All in all 11.10 is nice upgrade that make unity interface functional but their is lot of hick ups with applications that is integrating with unity and some of the bundle applications are not unsalable at all