I took the Air India flight to Delhi from JFK few months ago. Despite the bearable level of 'Desi- attitude' vibe on board, the overall in-flight atmosphere was pleasant. I wouldn't give high rating to the meals served, but as far as the timing accuracy, general in flight service, and the comfort go - I thought the one-grand damage was well worth! Additionally, I found airport staffs pretty friendly (most of them were fairly young -- in the 20s) and cooperative. Duty free shops offer amazingly low priced items. If you are a smoker, or want to get a gift for your smoker friends, make sure to spend  few bucks on cartons of cigarettes at the DF shops.

For the price they offer, I'd recommend flying AI to/from Delhi - especially if you are one of those ppl that prefer a single long flight over multiple layovers!

~@~