The open guard is great for opening your game up but the bad thing is if your facing a guy at equal skill level your going to get pounded or he will stand.
I am prefering the closed guard chilldog version or halfguard sitting on the elbow point over butterfly or openguard.
nog plays a nice game but eats alot of shots aswell.
mind you if I were a great striketr I'd use open guard more.
whats your opinion on the mma guard