If either of my summoned monsters had that feat I'd have killed the party fighter. As it was, he lived.
He charged out first, and got Held. The summoned critter wasn't close enough to CdG, but charged and attacked. Next round the bard engaged the monster, drawing its attacks, while the priest summoned another monster, again too far for the CdG. It moved up and attacked the Held fighter again, and then the other fighter and the rogue attacked.
So it would have been great there, but neither monster could have had it, and I haven't seen it come up other times.
PS