We booked the Kozy Retreat for a large group of friends (along with their various kids). We ended up with a total of 23 people, but we could have fit more because of the awesome size of the house. The bunk room in particular was great, since we had a whole lot of girls that almost filled it.
The kitchen is one of the best-stocked I've ever seen in a VRBO house. Plenty of dishes, utensils, and enough pots and pans for the cooking we did. There was also a bunch of hot chocolate and apple cider packets, which was a nice surprise for our non-coffee-drinker group.
The deck area was a favorite of ours, with beautiful lake views, deck chairs and picnic tables.
The communication with the owners was great. We didn't have any issues during our stay, so I don't know how they respond to problems. For me, anticipating and preventing problems is way better than when they have to resolve issues.