I updated my Ubuntu Feisty Fawn to Gutsy Gibbon yesterday. It was the fastest and most hassle free OS upgrade I have ever done. Kudos to the developers. It took an hour to download and install the entire upgrade and all my personalized items (desktop, music etc.) were identical to how they were before the upgrade. Ubuntu even sensed all the third party software I had installed and upgraded them where necessary.
If you have not tried Ubuntu yet, try it. It is worth the effort.
