I've play tested mainly against Darkrai/Hydreigon and I can tell you it works quite well. I usually got set up by turn 2-3 and as long a you can keep the Deinos or Zweilous off the field you are in good shape. Just make sure you start setting up a terrakion to retaliate or land crush the darkrai. Overall I have had great draws the last 10+ games I've played vs darkrai and have lost maybe 2 of the 10. I am aware that it's not enough test data but pretty confident in the deck.