A Ph.D. student at IIT Kharagpur experiences another side of life at IIT that is way different from the classroom life of a student. You get to use extremely expensive, sophisticated, and fancy lab equipment under the guidance of learned professors who are experts. You can access expensive software and computational equipment free of cost.
Usually, the Ph.D. coursework training is very interesting like any other institute. The distinguishing feature is the exceptionally good faculty members you get to work under. They are quite approachable and guide you throughout in such a way that you are ready to face the challenges of the field in real life.
Comprehensive vivas are extremely tiring and one could get interviewed for hours on end until the DSC committee is satisfied. But the bright side is that the faculty is always approachable and becomes your role model as you pave your way through your thesis. The only thing you require is relentless efforts to score the best and satisfy your faculty advisor.