I guess this is not a bad airport compared to others that I have been to. It is one of the busiest, but the thing is that it is mentained well. Kudos to the employees.
You will find tonnes of desis. The service is good and there are ample longues.
The only thing you want to know about this place is the underground train system. It is the easiest but any desi would get tensed when he would hear about these automated serives. But but.. it is easy. To change terminals, you look for the signs to get to the appropriate train terminal. After you are at the train terminal, wait for the train and board it and get off at the right place. It even announces the terminal name real loud and several times so much so that it gets annoying hehehe so even if you are blind, you wont be able to miss it and if you are deaf, they show it in different languages.
This airport is crowded but as I said, its mentained. Unlike airports like Chicago, which reminds me of Sahar Airport errrrrr Shivjai Chathrapathi (help me with teh spelling) Shivaji Maharaj Airport (i could take a round trip to NY by the time I take the name).
Anyways hope u get the general idea.
If you need help with ANY airport, or if you are travelling and need tips, feeeeeel free to email me.
Later!