Our family of 7 booked the room that had a large tatami-style bed for 5, and an adjoining small room with a double bed. The quality of bedding was surprisingly good, and everyone had a very good night's sleep. Space was a little cramped, but sufficient for bags to be placed on the floor.
Outside the room, there is a shared common area, and my family sat on the sofas and chatted after dinner.
We got all our meals cooked by the homestay owner, and while they were very delicious, we would have liked to have an option to walk out to explore different food options. However, there weren't many, if at all, options for street food which we could see. It wasn't a big deal, because the food cooked in-house was so tasty. The chef even asked us if we had preferences.
The location is great, close enough to the Mutianyu section of the great wall to walk (around 1km i think) but on quite hilly terrain so you should factor that in if you're also planning to hike up the wall.