You could be eligible for a complimentary (free) upgrade if you bought your Adobe software (full or upgrade) around the time that a new version.
There haven't been huge new features introduced with CC. If you are fine with your current CS version of Adobe programs, you are not missing.
Buy Adobe Creative Cloud Upgrade From CS3, CS4, CS5, CS5.5, or CS6 - Validation Required [Digital Membership]: Read Software Reviews - Amazon. com.