The house is enormous, well resourced, clean and fantastic for a large group! The house is slightly outside the town centre (10 mins walk) but that wasn't an issue at all for us. There are also plenty of amenities on the way into town, including some cool pubs.
Catriona was a great host, very relaxed about everything and simply left us to it over the weekend (while at the same time responsive to calls). Definitely recommend for any large groups visiting Killarney.