Overall: Cheap, but there are other hotels in the area that seem better for the price.
Location: 30 minute walk to the RER station, but you have to walk along the highway! Seems unsafe, especially at night. Not many local amenities (restaurants, etc.) as the hotel is in the middle of nowhere beside the highway.
Room: Seemed clean enough with new sheets on the bed. However, it was very cold and the radiators did not heat up very much. They also turn the hot water off at night! So if you arrive at night, you cannot take a shower since the water is only lukewarm.
Concierge: Not available 24/7, so if you come home late no one will be able to help you if you have any questions.