MRCHIPS I've been using Versomatic since last November (about 3 months) and it's been working fine. Its operation is unobtrusive - I forget it's there...
You can specify which folders it should monitor and how much disk space it should use for the backups. I've only needed to recover an earlier version once, but I was able to look back thru quite a few versions to find the one I wanted (an earlier version of a program I was working on that had some code I'd later deleted...). So, for me, it does what I wanted.
(Version 1.0.1)