My hockey team rented 2 units side by side and we comfortably fit 12 adults and a child, with everyone either having their own room, or comfortably sharing with one other person. Each room had its own bathroom, which was incredible to have so nobody had to wait for anybody to shower, etc. Everything was very well thought out, from things being labeled, being given very clear instructions upon check-in and check-out, quick communications, attached garage for parking multiple cars, rooftop decks, and all the necessary amenities. Everybody raved about how awesome the place was and how pleased they were that I found it.
The only drawback, which is consistent with what other reviewers said (so it didn't bother me because we had our own cars) is that it is not the best neighborhood to walk around in, especially at night. However it is a short drive to downtown and other more populous areas. I would definitely seek out other Heirloom properties in the future, based on how well this one is managed.