Great for the 15 of us! Lots of space, good sleeping arrangements and gathering spaces. Big kitchen table, nice bedding and towels. Loved the hot tub, and it was nice and clean. The only things we would change are: The pillows on the bed, everyone said they were way too thin and very uncomfortable. And the lack of Wifi made it hard to communicate with the hosts. I never could download the check-out information they sent on our second to last day. We really really needed WiFi.
Also, just be aware, if you stay here on the off season, which starts Oct. 1, lots of things are closed, like the Subway and other restaurants. And the tiny grocery store closes really early, when you are usually still getting home from Yellowstone and other activities.
All in all we had a great time and would consider staying here again.