We stayed at the Bagatelle after two weeks in the south of France, so that we could visit Parc Asterix. The hotel was easy to find. We had booked a family room, which had a double and two full sized singles. The beds were clean and comfortable.
Unfortunately, as we were visiting at the weekend, the restaurant was closed, although it did look nice, and the menu reasonable. Luckily there are several chain restaurants on the other side of the roundabout.
The receptionist was particularly helpful. We asked if there was any information on Parc Asterix and he printed info from the internet for us. He also recommended some excellent wine, and seemed very knowledgeble on the subject.
The buffet breakfast (not included in the price of the room) was good value for money, especially as there was no charge for the children!
This is a basic, but good, clean hotel in a convenient location. You can catch a train into Paris and Parc Asterix is less than 15 minutes away.