Ive seen him play some great high stakes NLHE.
Farha's got the world class NLHE game imo but allows tilt, boredom and his propensity to gamble to overshadow his ability unlike players like gold who in the future may improve at the moment can only play at a certain level and does look quite soft.
If i was Antonius or greenstien with the stacks so deep i think Farha is the player i'd find it most difficult to play against because of his unreadable playing range and underlying world class ability you dont know what kind of Farha you're going to come up against, i know he's played some donkish poker so far in the series and if he'd insta called with the mug end of the straight on the river when the amature guy reraised although its a pretty standard pass i'd be inclined to agree that he was still tilting and therefore maybe one of the softer players but he insta folded, didnt seemed to disconcerted or indignant and went on to make some disciplined preflop folds which makes me think hes fresh and ready to play some world class deep stack poker.
The point about Farha i'm trying to make(badly

) is that IMO he gets to chose whether or not he wants to play world class poker when he wakes up in the morning or if he wants to allow other things to determine what game he plays whereas other very good players will only ever reach a certain level without having his ability that more often than not doesn't utilize because he likes a speil, but with these stacks and after seeing that 1st episode he'll be dangerous
For me, if you can't control tilt at the level you play, then it doesn't matter how skilled you are at the game, you're a poor player.

All these players are capable of great poker but the difference between very good and excellent often comes down to how you react to a beat.
Especially in Cash Games hence Brunson/Greenstein/Reese's long reigns in the Big Games.
I think Farha is very aggressive but a perfect opponent if you have position. Alot of the times watch Brunson, Greenstein their playing reasonably ABC poker then just using good reading ablity to pick the right spots. But are rarely out on a limb with a big bluff.
A few of the younger players seem to looking for the big TV play. Gold especially but cash is all about winning the $$. I think Antonius has the right game for longevity in the cash games same as Greenstein & co.