> your data is scattered in some proprietary format
This is a really good point. I had been using Ghost, and Ghost was unable to recover my data. I will never again use a backup system that stores the data in a proprietary format. I don’t even care about compression. Disk space is cheap. That’s one of the nice things about SyncToy, the files are stored in their regular format. I can plug the external HD into any computer and read my files.
BTW, I also have a Mac, so I let Time Machine backup that machine. Since I’m still new to the Mac and don’t fully trust Time Machine yet, I have my Mac files mounted over the network by the PC, so those files also get backed up with SyncToy in addition to Time Machine. Can never be too safe!