I have been using CrashPlan for over two years for about 30 of my customers. Aside from a few issues with memory usage for larger backup sets (issues that were quickly resolved with by a chat with support), I have had almost no problems. Backups run, complete, and restores always work. The software's focus is on backing up endpoints, not servers. But it works fine with simple file servers and is a very inexpensive way to protect data. It's really a last resort backup for most of my clients - not something they depend on from day to day, but it's a great solution in case they end up with a hole in the ground for an office. The setup process only takes a few minutes. Restores are relatively intuitive - just pick a date and then pick a file. Small restores can be done through a web interface. I have never had to do any large scale restores, but I can imagine that they would be difficult since there is no way to have a hard drive shipped to you - the restores have to be done over the internet through their software.

Stable, consistent, efficient, simply works fine

On the whole, if you don't have a ton of data then there are lots of free backup options that might meet your needs. On the other hand, if you have many terabytes that need protecting then I thin CrashPlan is the best choice on the market.

It's a great, set-it and forget-it tool, but Code42 still needs to work on improving end-user experience and encourage end-users to keep their backup list up-to-date so Admins don't feel obligated to nag their co-workers about it when things go wrong

Easy of use and cost effective.