Yeah , IBA is a credible institute . but the problem is that even if there is transparency in test ,they mess up everything in interview and further selection.
Those who have a source got selected and those who don't have sourve told that there is no vacancy .This happen with me last time , I had a masters degree and got 83 Marks , and I was told that there is no vacancy in my town.
Koi Allah ka bunda poche vacancy nahi thee tu pehle bata dete ...Waste of time , money and effort .
If you are interested , Do apply as we should do what we can . leave rest to Allah (swt).
We attempt things not because they are easy but because they are difficult and in that way we achive Greatness.