there's no hassle in delhi. like saajha told above, sometimes there are long layovers and if you don't mind it, then delhi and AI is worth the experience. i came to frankfurt in IA plane and it was quite new compared to cathay (which has great service too) boeing i took in april from US to ktm. the meal was decent i would say...i enjoyed it. delhi airport can be little confusing if you are traveling for first/after a long time as they are going thru lots of changes.

depends on your own attitude how people treat you. people in the delhi airport helped me whenever i asked with a 'please' in the beginning. and that applies to everyone i suppose...i mean, why would you be the nicest person in front of a khaire dhedu but pose as an angryman to an indian?