I read that before we got ours and it doesn't match our experience. We put him in with 2 Leporinus fasciatus fasciatus, amongst others and he made their lives a misery, he would not leave them alone so he's in with the crayfish. He just chased everything in the tank - there is nothing he won't peck the hell out of.
I wouldn't recommend them to anyone unless you kept them on their own.