As the vast majority of the Drupal websites that I currently work on are built on Drupal 7, I thought that it was time that I upgraded this site. Following the core upgrade process and the CCK migration process, everything was upgraded smoothly without any issues.
I’ve upgraded a handful of essential contrib modules to the latest stable version, Administration Menu, Views etc., and will continue upgrading the other modules on the site as time allows.
I also prefer Bartik to Garland - but I will be creating a new custom theme when I get a chance.