I spent the last two weeks revamping the Real-Time RAID core to make it more stable.
As of now it is experimental but fairly stable (and more stable with the release of 2.0 update
RT RAID vs Snapshot RAID depends on your usage scenario.
I use Snapshot RAID for my mostly static data like movie backups, full system backups, music and the likes.
I then have an RT RAID setup for my data that change frequently like my hourly incremental backups, temporary downloads, etc.
Snapshot RAID required scheduled update runs and leaves you vulnerable for certain changes
in between updates.