Just got back from there last week.
The resort is very nice. The units are 2-story townhouse style units, with a large foyer, half bath, full size dinning room and living room, small but fully equipped kitchen (including washer/dryer), and an outside patio all on the ground level.
Upstairs are two bedrooms. One has two twin beds, but are next to each other. The other has a king or queen size bed, and it's own bathroom. The master bath has a tub with shower. The other upstairs bath is off the hall, and has a shower.
There is an indoor pool, and an outdoor pool which is open seasonally. The whole style of the resort is a small French village.
They also have free wi-fi if you have your own computer. They also have computers to use if you don't bring yours, but that is pretty expensive.
They have a typical Marrott MarketPlace on site. But there is also a nearby village (within walking distance - maybe 10-15 minutes walk), that has a grocery store, a bakery, some restaurants.
The check-in staff was great, and will give you all the information you need.
The resort is not IMO within walking distance of the train station.
The train station is in the middle of the
Disneyland resort, and there is a bus area adjacent to it. Here you can catch the #57 bus to the resort. It is a complimentary shuttle that goes to the Radisson and the Marriott. However it's not real frequent, especially during the middle of the day. I got there at 1:30 pm, and there was a bus at 2:00 pm. But the next bus wasn't til about 4pm. They will give you a bus schedule at check-in. There are about 10 trips per day. Maybe in the summer there will be more - don't know about that. There is also a public bus that goes by the entrance to the resort. It's more frequent and cost 1.40 euros. I think it's bus #34 (not 100% sure - I never used that bus).
This train station is also where you will go to catch the RER trains into Paris. These trains are very frequent. For a 1-day trip into Paris, I got the 1-5 zone 1-day mobilis ticket, which included the RER trains to/from Paris, and unlimited Metro rides in Paris. Cost 12.30 euros.