I did a lot of research into it before I rebuilt my media server (running Windows Server 2012 Datacenter).
I don't believe SirEvans issue is was related to the ReFS. Apart from anything else, NTFS can die in the same situation.. Not much you can do about faulty install/hardware issues.
From everything I read (and my own limited testing) performance is pretty close. In all situations it was within error rate of NTFS, barring a few blips. Permissions are managed differently on the drive (as observed above) so they can be updated much more rapidly. There are however, other issues. I couldn't get MSSQL to talk to my ReFS hosted database. It didn't like it one bit. There's also a lot of anecdotal evidence talking about media systems bombing out with it (in particular PLEX). This is in part due to limited MS support atm, and some NTFS specific code in some apps.
Whilst it is more redundant (and pretty much does away with check disk
(so much hooray)), it's just not ready for the prime time in my opinion due to lack of support. I'll be pleased when it's fully supported and usable. It seems to be an enormous technical improvement
I considered using it on our external backup media, but it gives no benefit over NTFS in this case as the backup drives are snapshotted, so they're never undergoing constant change (which is the biggest benefit scenario for ReFS).
tl;dr - Avoid for now