no no no. boo.
true: this hotel is adequate, kind of...
but at 100$ a night, you're paying 3-4x what you would for similar quality in Paharganj. (!)
staying here means you burn cash for a decent hotel in a pretty rotten neighborhood.
Delhi is tricky -- i've stayed in 8 hotels here at the budget level, and TripAdvisor (which was invaluable in Kyoto and saved my life in Beijing) was useless. LonelyPlanet came a lot closer to helping.

You can get a decent room, with some work for 30$ a night in Paharganj, which is more central than the madonna. The madonna staff wasn't particularly friendly -- and when they gave travel advice, you couldn't help feeling like they were scamming you (a pretty constant feeling in delhi, where everything is barter -- it gets old). (The madonna staff was always trying to discourage you from talking to others about your travel needs)

Delhi on a budget is tricky -- but it can be done -- and location is pretty important (you won't be spending much time in your hotel room, anyway...) Noise and smell are the two things to be wary of in a delhi hotel room -- the madonna had both. a sweage smell (not as bad as some others i've stayed in) - and the constant din from the street.
i've stayed in worse (though for a fifth of the cost! 20$ a night) -- and i've stayed in places where the doors are thin and you can hear the staff talking all night (oddly common experience in Delhi)
But buyer beware -- just because TripAd has no reasonable options for delhi (isn't india supposed to be cheap?) doesn't mean they don't exist. Look elsewhere for the deal and the inside info. LonelyPlanet's a good bet.

Stayed at the Hotel Madonna, ideal location to see the real Delhi. It is a clean and safe hotel by Delhi standards and the food was acceptable. The hotel is located near the the metro which is a great service, and at a very low cost, about 10 mins walk from the hotel. Regarding the hotel clean sheets and towels provided every day. Try the marsala omelette which is very tasty also the beer is chilled and very welcome after a day saying no to helpful people!!! who approach you in connaught place . Helpful staff but please have small change when you first arrive as my friend and | both got caught out , a tip of less than 100 rupees is probably more than enough for carrying your bags to the room.Noise is a major factor please bring ear plugs or you will get no sleep. Certainly not a tourist hotel.

A decent Delhi hotel at a reasonable price. Clean and comfortable. Near the Metro (5-10 minute walk) so accessible to much of Delhi. In a lively neighborhood with shopping opportunities all around. Just two doors down from a fast and inexpensive internet cafe. The staff was helpful but not friendly. Also not particularly attentive: they took my passport when I arrived but failed to return it when I checked out costing me an hour (could have been worse if I hadn’t remembered). Breakfasts were good and the one dinner I had was very good.

Found this hotel through contact at Delhi airport and what a wonderful experience it turned out to be. The rooms were very comfortable and service excellent. We were also able to avail ourselves of the excellent service of Naresh Bhatia in organising a driver toshow us the sights of Delhi and a tour of Agra and Rajasthan for 12 days where his knowledge is second to none through his experience of booking everything including private taxi, knowledgable driver Ramesh and city guides who ensured that we ha athoroughly wonderful time. We then travelled back to Delhi and stayed at Hotel Madonna before going on to Amritsar where yet again the service provided was excellent through organisation of flights and trains including pickups to hotels etc... After this marvellous experience we returned to Madonna to conclude our stay before returning to Goa. We would definitely recommend this hotel and the services of Naresh wishing to have an excellent visit to Delhi and further afield.