Depends what you mean. He’s considered the strongest 3 drop in the game. Played from behind he is a pain to completely remove. When you can trade with him he’s an ideal target for abusive, argus, and the dire wolf.
You can frequently have 2 1/1 pop out of him so he represents 3 mana for 5 stats.
Zoo is early board control via efficient minions. He does this quite well