Just finished the upgrade yesterday. It runs much faster than Yosemite! I've been working in Photoshop, InDesign, and Illustrator all morning. These things used to really slow down to a near halt. For the age of the computer, it's really worth the upgrade.
Not quite as impressed after the xx.1 update.
Not sure what is causing it but doesn't feel as light or snappy as the initial upgrade. Have had more beachballs in Safari and things like Spotify/iTunes or playing vids on Quicktime. Seems like most people are doing well so trying to pinpoint what is going on. How has everyone else been getting on?