Yes this might be advertised as being close to the airport, but only distance wise, not convienence wise. There is NO train connecting the two places so you have to travel backwards to paris nord before you can get a train to the airport. It is in a sketchier area anyway. As others have said, your savings will be lost on extra train fares (since further away from everything) + taxi. Hotel staff quoted us 25euro for a taxi to the airport and promised to order one for us and have it outside by 5.50 AM. Not only did they never do this, but then the front desk guy in the morning quoted 35euro to order another one. When the taxi arrived, now 30 minutes late, the driver quoted 50euro. That is basically 80$ to get to an airport 10 min away. We only had 35euro so he refused to take us. I was within minutes of missing my flight due to this crap (had to then take multiple trains). Arrived at the airport 20 minutes prior to takeoff for an international flight. Only due to a miracle was the checkin line and security line short enough for me to make it in the nick of time......
This place doesn't offer free breakfast, doesn't have free wifi, and every day gave us 1 bath towel for 2 people (no hand towels). The flusher was missing on the toilet. The door had been broken into before. The sink didn't drain at all, either did the shower. The pillow was abismal. The TV was from the 1980s. They still use actual keys instead of keycards to get into the rooms, and require you to keep them on the giant key holder.
Stay in Paris by Gare Du Nord, then it is a direct route to the airport by train. Also you will get way better service, way better choices, and have far more things close to you.