Let's talk about Masked heroes o:

I think they're pretty good at wiping out my Covenant cards and monsters to go with them. I either have to deal with Dark Law locking my extra deck and messing up my searches or the Acid/Zero combos obliterating my board. :<  I have a harder time with them than Shaddolls, that's for sure.

I like them, there's lots of fun things you can do with them :3

Competitively speaking: The matchups are pretty even across the board, although you do have to work a bit harder to maintain advantage than you would while playing a higher tier deck. Still with the right side deck cards, deck thinning cards and a little luck it can do well.

Side note: You should check out the HERO thread