We've stayed with our family at Mary's house on Shore Street several summers in a row. It's a beautiful place to stay in its own right - spacious, inviting, clean, and very homelike. There is a lot of natural light from the many windows, and there are wood walls and floors in most of the rooms. We like to cook, and the large kitchen is well stocked in terms of pots, pans, bowls, and other cooking utensils.
In addition to the warmth of the house itself, the location is perfect. It's a short walk to the beach and a slightly longer but easy walk to town. You can see the sound and Martha's Vineyard from the large front window, and you're also just a few minutes' bike ride to the bike path. Finally, Mary, the owner, is very kind and helpful and has always made our teenaged children feel welcome. If you are looking for a simple, lovely rental with real Cape atmosphere, look no further; this house is just right.