Never heard of it before, but I'm grateful to hear about it! My projects were always small enough that a traditional version control system wasn't worth the time to set up. Just keep an archive of each day's progress in a folder and call it done.

With my latest project, I'm maintaining multiple splits of the codebase for different platform-specific features, and sharing the code with a team member. I was about to bite the bullet and start installing cvs or git in a VM and going through the learning curve, but this seems right up my alley and the kind of system I'd mesh with well. Thanks!