Kalyan was my Gmat instructor couple of months back. Even though my coaching was only for a little while, i had great time working with him. He is very committed and passionate about the work he does. You rarely get such an energetic trainer.
To accommodate the timings of different regions, we used to have classes sometimes in the midnights. Even at that time he used to amaze us with the same level of high spirit as it is during the day! His knowledge of Gmat test is simply amazing! I would recommend him to any Gmat pursuer at any time!