Sadly, split brain is still a bit of a sore spot. It probably will be as long as GlusterFS continues to use the "fan out" replication approach, though past and future enhancements around quorum should help too. On the other hand, it's great to get such positive feedback about the "everything is regular files" doctrine. It has certainly been a bit painful sometimes, especially in terms of performance, but the feeling has always been that the ops advantages are worth it. Nice to see someone else agrees.

(Disclaimer: I'm a GlusterFS developer)