We chose this hotel primarily for two reasons. It is on the shuttle bus route and it provides a complimentary breakfast. We weren't disappointed. The shuttle bus allowed us to park our car when we checked in and didn't move it for the entire length of our stay. The front desk staff was friendly and helpful(Walter booked a nature cruise for us and got a discount). The breakfast was basic, but decent- best thing was the french toast.
Due to the time of year,September, we didn't try some of the amenities, like the pool or firepit, but there seems to be a variety of activities, like movies with free popcorn and snacks in the late afternoon. We did hike to the trail in the park which was well marked and pretty easy walking.
The room itself was clean and updated. The bathroom was nice with a good shower. My only gripe with the room was lack of hooks in the bathroom, but that seems to be the trend.
I would gladly book the Acadia Inn again if I am back in Bar Harbor.