We (a family from Germany with three grown-up children) rented the house for five days in the summer. Letterkenny is a perfect starting point for exploring Donegal, and the house a wonderful base. The house is spacious, has wonderful views and is well equipped. Garry was an attentive host and has lots of tips ready for exploring the area. The beds are comfortable, the wifi is good and the multimedia equipment is complete. The town of Letterkenny is about 5-10 minutes by car, supermarkets (including good discounters like Aldi and Lidl) are only 5 minutes away. I would only rent the house with a car, but then it is a perfect accommodation. The wonderful view is a great bonus which we enjoyed very much. We had a perfect time here and can only recommend the house and Donegal to everyone. Donegal has so much to offer, I would say absolutely underrated in terms of tourism (lucky for us as it was very empty everywhere).
Many thanks to Garry, we have certainly not been to Donegal the last time.