I have one of those masks. They are nice, but fogged up too much for me. I was using the flack jacks, but I just upgraded to a pair of ESS turbo fans. Which worked perfect this Sunday.
The save phace masks have an optional fan for them I am probably going to get with my mask when I order it, I will let you all know how the fogging is with that, its only like 47 bucks for the fan kit and the masks are so sick looking I think its worth it haha