He doesn't take Bank coaching, but coaching for Maths of 11th, 12th or IIT JEE.
Very bad coaching. I was here for AIEEE Maths coaching in 2000s. Sir teaches very fast, skips missing steps and absolutely NOTHING is understood by the students. Not just that, Sir knows this too. In our batch he himself used to say: "I know you haven't understood anything. I know I teach too fast and don't write the missing steps, which if I wrote, you will understand."
Confidence is SHATTERED by his teaching, and it has a percolative effect on other subjects too. He keeps everything unclear, teaches the easiest of things in a very difficult way. He is a good-natured man, but a very bad teacher. Won't be an exaggeration to say 'Sadist'. So many people from our batch left his class, including the girl who was 16th merit in 10th standard Board exam in 2004, to join Gadkari Sir's class. Very overrated teacher. Join any class for Maths, but not here. Unless you know basics beforehand from elsewhere.