I've been using snapshots for a couple of years. So far I've only had to restore a snapshot once, but it and it worked fine. The snapshots are created almost instantly and they don't use much disk space unless a lot of stuff has been changed.
Spent like a few hours learning about and setting up snapshots, only to never every use them lol. I guess I just don't break my computer often enough nowadays. Copy-on-write is great tho, especially for making quick backups of a large directory structure before running that risky shell one-liner.
