My friend and I spent 1 night here on a road trip around Ireland. It's a very nice manor house, food was very good and the hosts were delightful! Had a nice visit over a sip or two of whiskey before heading into town for Irish traditional music at the Reel Inn - the best night of music we had! The only negative was location as it's outside of town on the highway. If I get back to Donegal, I would definitely find a place in town as I enjoy being able to walk to places and being part of the town. Donegal Manor is basically a small hotel, quiet & private, so if that's what you're looking for, I would recommend it.
