One of the busiest airport in the world. I reached there at night on flight from Amritsar to Delhi with my wife. We both were never there before. But the sign boards are giving you directions everywhere. We reached at domestic terminal t1c and then walk to t1d for our next flight. Airport is very clean. Good security. Cabs are available too at t1c outlet. Hotel is also there at ground floor of t1d. A bit expensive but good. Good sitting arrangements for waiting room. Clean washrooms. Overall good experience.