Rove Beetle - any bad experiences?

This guy must have come in with some seed pods or leaves or bark I’ve added. From what I’ve read these are welcome neighbors, and he seems to dance around when I come up to the tank. Anyone have any bad experiences with these fellas?

This guy must have come in with some seed pods or leaves or bark I’ve added. From what I’ve read these are welcome neighbors, and he seems to dance around when I come up to the tank. Anyone have any bad experiences with these fellas?