We stay here once a year when we visit Cape Cod. Great location and staff. You are a block away from the Steamship Authority dock so parking for the ferries to Nantucket is not an issue.
The rooms are super clean and very roomy, we like the ones on the end of the building that face the harbor, the Cotuit and the Centerville. Those have 2 sets of sliding doors one facing the harbor and one on the side. Great for sitting out having morning tea and watching the boat traffic.
Conveniently located in the center of the Cape, lots of great breakfast places in Hyannis a short drive into the center of town, although the continental breakfast there is very good. You won't be disappointed.