It is amazing in zoo. 4 mana 2/2 rush that summons two 1/1 imps.
It's not Impact enough. I found much greater success with 5 mana 4/5 Taunt Shield guy instead. You have taunt and big stats for 1 mana more. In particular in zoo / midrange, where you usually have plenty of stuff to trade up, a 2/2 felt very underwhelming. The best thing to happen in the deck is Faceless Corruptor tho. That is a mid-range dream come true.