I have mildly bad experience with gluster. I did never lose data, but the maintenance load was very noticable! Ceph will rebalance by itself when adding (or removing) disks. That alone reduces maintenance by a huge amount. For Storage clusters I don't care about as much, it's also nice when a disk fails that ceph will notice and react automatically. Replacing the disk is then something you ought to to at one time, but you don't have to do pretty soon.

I am running some rook-managed ceph clusters now that make even ceph infrastructure nodes automatically recoverable. But I did not test that enough yet.