We've found THE NANEE SUITES to be a nice little hotel, fairly new, on the southern outskirts of Delhi. 24hrs concierge with fluent English, very tidy and clean room, comfortable beds, nice bathroom, fully working air condition. Bedsheets and towels changed everyday, plus two bottels of water on the house. Breakfast is good, freshly made.
The location is not very close to the center. Driving time to the center is about 20mins, depending on traffic, the airport (Indira Gandhi International Airport) is about 30mins by car.
There's a mall with some nice local restaurants nearby. Good food and fair prices.
All in all, I can totally recomment this hotel. We're going to stay there again next year.