We understood from reviews and photos that this flat was a little quirky - and it was. In many ways that was the charm of the place, after all.
You would need a car unless you planned to just sit around. With a car you are perfectly situated for 2 large supermarkets down the road toward Waterford and, of course Waterford itself. At the end of the day you have a little home in the country to return to. It suited our needs very well.
The kitchen area is quite small so you need to be inventive about food preparation but the supply of equipment is fine. It was a Bank Holiday and Leonardo and Bernadine had very sensibly gone to the beach but we met up later on the weekend and had interesting conversations. While in the area we cycled on the Waterford Greenway, did city walks and were lucky to be in town for the Feast of Corpus Christi. A very enjoyable 3 days.
Our only caution would be that if you are used to "5-star" airbnbs then you should look elsewhere and be prepared to pay more.