Responsive hosts, convenient location and well-equipped with giant tv, wifi, washer/dryer, full kitchen.
Stairs may prove challenging for younger kids. Single bathroom may also be an issue if you have a big group and some have to sleep on the futons in the living room.
Will be perfect for 4 people with the 2 nice cosy rooms upstairs but will also be good value if you have more, just that those in the living room may be slightly inconvenienced by the rest using the bathroom/kitchen or noise from the washer/dryer.