Site Upgraded to Drupal 7
Warning: This post is over a year old. I don't always update old posts with new information, so some of this information may be out of date.
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.
About the Author

Oliver Davies is a Full Stack Web Developer and System Administrator based in the UK. He is a Senior Software Engineer and Technical Team Lead at Inviqa and a part-time freelancer specialising in Drupal, Symfony and Laravel development and Linux systems administration.