This is a two-room small house at the site of a youth hostel in Black Valley. Definitely suitable for 4-5 people, if you don't need a lot of inhouse space. The hosts are very kind, and gave us very useful information for hiking and practical things.
This valley is/feels quite isolated from 'the rest of the world', and we liked that a lot. The ad recommends to bring food with you for a few days, as the nearest shop is +10 km away. We would like to add to that: these 10 km are along the Gap of Dunloe, a 1-car wide curly road that goes over the hills to connect the valley to the region around Killarney. It easily takes you 30 minutes of slow driving (one way). Therefore it's really useful to have that food in your car before entering the valley.
If you don't mind the isolation, you'll be happy about many options for hiking, running, hill walking and some water pleasure. And beautiful scenes at any time of the day. We enjoyed it a lot.