I’ve recently updated my office PC and my notebook to Ubuntu 15.10. To be correct, my PC received Ubuntu Gnome 15.10 and my old Lenovo x121e got the latest xUbuntu 15.10. In contrast to my last version updates this time the whole progress worked flawlessly. No problems with packages, configurations, drivers and other parts liable to make mistakes. xUbuntu still runs fast on my underpowered notebook. Ubuntu Gnome received some quite neat UI updates. If you want to try one of the Ubuntus on your computer have a look to the How-To.