I was also a Crashplan user, now on Backblaze. Backblaze saved my butt a couple of months ago. I'd been working on a document that was close to being finished. I screwed it all up, didn't realize it, and I saved all the garbage edits. The next day, I figured out what I'd done, but there was no way to undo my mistake.

This was when I discovered that Backblaze creates hour-by-hour versions of docs from the day before. Hourly backups eventually get truncated so if I'd needed to find something from the previous week, I'd have a choice of Monday/Tuesday/etc. Anyway, this was a lifesaving feature.