We visited the island for a 40th birthday ladies getaway. There were 6 of us, which was perfect for this unit. (There is even additional sleeping via the pullout sectional if needed.) We stayed on the first cold weekend of the season, so naturally there were a few hiccups, but the property manager was quick to respond and take care of our needs. She was wonderful and communicated with us before and during our stay.
This rental is the first floor of the house, so you will hear the people above. If that may bother you, then I'd suggest a different rental (or rent the 2nd floor instead).
There is no central heat, so if you come during cooler temps, expect to use electric heaters in the bedrooms and fireplace in the living room. NOTE if you have children, the fireplace and gas valve/line is dangerous and exposed.
The location is excellent. It's close to the boat and restaurants and grocery store, everything is walking distance of just a few minutes.
We would definitely stay here again.