At least we are getting a chance. The world cup semi final match in 2011 where Sachin was given out lbw and he went for a review in which it was over turned. What if there was no drs? India would have found it difficult.
BTW, I'm not against increasing the number of reviews. Review system causes significant delay in the match proceedings, but at least some decisions can be made right. As Rahulan said, fines should be imposed if time is wasted unnecessarily if there are more number of reviews. But I strongly believe it's high time India/BCCI start using the drs.