Outside of unlimited data plan for cheap, Carbonite offers no other services. If you are looking to just backup your computer than Carbonite is for you, but if you would like other services like syncing between computers, versioning of backups, remote access or any of the other features commonly associated with online backup than Carbonite is not for you.
Carbonite has good customer service and can relied upon. They have an extensive knowledge base, video tutorials, FAQ section and after filling out a emailed form you can contact them via telephone and chat support. They support is well done but often times looking up the question yourself in the FAQ or the knowledge base is quicker.
Overall Carbonite offers a great price for itís one service. If all you need is online backup and none of the other features than Carbonite is a good purchase. We find though that spending just a few bucks more for other unlimited packages that come with features is worth the price.