I was really worried about whether we could find this, based on reviews because it is not clearly marked at the airport (in fact, there is only info for the Marriott Courtyard). People made it sound like insane walking at the airport and upon leaving the airport. You just take the CDGVAL tram to parking 3 (which could have a better name as the stop for so many hotels). You will not be sure this is correct, but as soon as you get off, you will see several hotels off to your left. The reviews on this were all over the place, but I'm going to go with 300 yards. It is an easy walk on paved paths, but in the rain and cold and dark, it seems pretty bad. In the morning, it was shorter :)
The breakfast buffet is EXCELLENT. This is not your typical crappy hotel buffet. Restaurant food was fine for dinner and staff was happy to open a bottle of wine we had with us when we had no corkscrew.