The Oberoi New Delhi is a property which we almost stumbled onto accidentally but ended up loving. The room hardware and public spaces are thoroughly modern and service is as good as any that I have encountered in any city hotel.
After a fantastic few hours spent enjoying the restaurant quality food and drink at the private First Class Terminal, we were guided through a private border post and had our bags loaded onto our Porsche transfer vehicle.
Superb room hardware and the game viewing was as private and wild as you could possibly hope for. For the majority of our time on the game drives, it felt like we were at one with nature, totally disconnected from other human beings and the outside world.
All in all, the Air China lounge doesn't have a lot going for it. If you're connecting it's worth heading there to use the showers. Otherwise, given the quality of F&B available in the terminal, I'd probably skip this lounge and go in search of some xiao long bao (Shanghai dumplings) in the main terminal area instead.