I have stayed in DDR for several times during the year 2013 - 2014. The place is very accessible. Right in the middle of Gurgaon Civil Lines and Delhi IGI Airport. Compared to many other similar hotels in that area, this one is decent too with reasonable price.
The rooms may not be excellent and neither the food will be. The room service is better than many other hotels that Delhi area, which is a relief.
Overall, it is typical average with reasonable price.