If you want to go to Paris, and don't want to stay in the center, and I can see how one would prefer not to, this is a good budget choice. The metro is barely a 1 minute walk from the doors, and takes you to the heart of Paris (Champs-Élysées) in less than 10 minutes.
The view from La Defense is breathtaking and the area, while not being the typical Paris experience, offers a lot for relaxing, shopping and dining away from the hectic Paris Centre.