Looks like a fairly decent spinner. But we have seen time and again that spinners need that extra bit of X-Factor when bowling to Indian batsmen.Just some side info. In August 2009 Imran Tahir, the pakistani leg spinner, qualifies to play for SA so that will give SA some extra firepower when touring the sub-continent. He has been very successful in SA franchise cricket. Here's his career stats:
Mat Inns Balls Runs Wkts BBI BBM Ave Econ SR 4w 5w 10
First-class 77 94 14340 7507 297 8/76 25.27 3.14 48.2 18 4
Cricinfo - Players and Officials - Imran Tahir

Mendis, Murali etc have that. You never know, he might be good or he might be decent. You can't predict stuff before they happen.
