Whatever city we visit, Elliot insists on riding the metro. Delhi was no exception - and in fact, New Delhi's underground transit was by far the newest and nicest infrastructure we enjoyed during our entire stay in India.
That being said - like everything in India, it's different. And crowded. First, you need to buy a token to get on the train - and you can only get a token from a person in a booth at the station from which you are departing. You can't buy a return token - just one-way. So there are long lines to buy tokens at every station. Then, there is another long line to get through the security screen. Or actually, two lines: one for men, and one for women and children.
Once you are through security and into the station, the platforms are clean and air-conditioned and rival (or beat) anything we have here in the US. The trains are smooth and quiet and air-conditioned. Sometimes, they're not even crowded.
After one good experience, we decided to ride it again - but this time it happened to be rush hour. And the trains were packed. I mean, really packed.
I've been riding public transit my whole life and I think this was honestly the most packed in I've ever been. But like most experiences we had in India, the people were quite gracious about it.