I had some issues using the automatic update. Instead of taking 10 minutes it took me about an hour. Since automatic update corrupted the core and managed to leave me with an inoperable WP site. I had to then resort to manual installation. That was a breeze. With the current failure rates i am facing with the automatic updates, i have decided to go ahead with manual updates. It would be good to get your feedback on the experiences you have on this.
Freelance Web Developer & Photographer