It reminds me of the UG tempo decks from TSP Block Constructed—the creatures look embarrassing but suddenly you're dead and have no idea what happened.
It's okay but its worst matchup is U/W. You have so much removal and they can't deal with it—Gideon is too good against them.
I think we need another set to see it really hit the meta. It's close but it's missing a few cards to make it a real deck.
It has some really powerful tools but it probably won't exist successfully as a linear aggro deck for a while. I think Phyrexian Crusader has a place in control decks.