I thought that Shabana Azmi was one of the best judges from a non-musical background that I saw in a musical show...
She is a great artist and understands the intricacies of art very well... being the wife and daughter of 2 very sensitive and talented people perhaps adds to her ability to provide very fine judgement...
What I really liked about her judging that she was bang on with most of the contestants, and barring Cahru (whom she praised for some odd reason) - she have very technical and correct comments! Loved her in the show!