I have been determined to run a competitive Crystal Beast Deck for a while now but there is some glaring weaknesses including Lockdown, Spell and Trap Destruction and even Effect Negation. The swarming power of CB's are not to be sniffed at though and can easily swarm the field with just 1 Ruby Carbuncle. Xyz's have opened up more possibilities by loading the Extra Deck with Ranks 3 and 4 and of course we have the Trump Card Crystal Abundance. I very nearly scored a OTK in my second Duel with it.
So guys and girls, is Crystal Beasts worth running? I am not giving up until I have a decent Deck.