Ravi Vattipalli says :

I used RTI twice so far. In both cases, I would say that I had a good experience. The most important aspect is to frame the questions very precise and clear. The questions should ideally not be of the form to get an “Yes” or “No” answer. Rather, they should be to get some explanation/details. This allows to probe further, in case clarifications are needed to address a larger problem instead of a specific issue in concern. Before filing RTI, I would recommend regular routes of getting information through contacts, internet or preferably go to the concerned office. Only if you are not getting what you are looking for, go for RTI.