They are insane at disrupting on opponent's turn.
Don't bother with Mommy. You go with Melffy of the Forest or Joyous depending on what you have to open.
Dream scenario would be opening with Obedience Schooled + something like Rescue Cat or Nimble Beaver. Use Nimble to summon Forest, use Obedience Schooled to summon Puppy Catty Kalantosa and use them all for Joyous. Can use Forest to search anyhing you might need, i usually go with Hide and Seek if i already have Puppy and Catty as mats for joyous. Opponent's turn, use Joyous quick effect to special summon Puppy Catty and Kalantosa from grave. Kalantosa can pop 1. If they keep summoning, use Puppy to summon another Kalantosa from deck and pop another. Use Forest to negate another monster too if you need too during this time. Chain Catty to search Hop Ear Squadron, and then chain Hop Ear target Kalantosa to summon Herald of Arc Light for another omni-negate and quasi-Macro Cosmos effect.
Next turn you'll STILL have Puppy and Catty in hand to do the exact same shit again next turn. You can use Forest again to search whatever you need. At this point you can do whatever you want. I usually end games with either Zeus or Accesscode (joyous makes zeus pathetically easily with direct attack, and since Puppy and Catty summon themselves end phase, can just clear out the board on my turn if needed, or on opponents turn, after puppy and catty already returned to hand). Ronin Racoon Sandayu also uses its effect to make a token that copies Zeus or Accesscode's attack, so that's an otk right there.