Roísín has thought of everything a traveller might need during a stay, from charger stations (is that what you call it?) in the room to (quality) toiletry to a topped-up LEAP card which is your best option for public transport. Some milk, butter, jam, granola, tea and lovely homemade bread greeted me on arrival. (I topped up the LEAP card and the tea back to what it was before I left.) Clearly, if you forgot all your luggage except for your clothes you would still have everything you need in the flat. I was free to use the washing machine once during my stay. The room is bright and big enough for one, two would be OK for a shorter stay I would think.
I liked to be able to be at the Dun Laoghaire waterfront in 5 minutes with the bus. From there, apart from the town itself (great 2nd hand bookshop, good coffee at Shoe Lane, newspapers at Eason's), it's advisable to take the DART train to the other seaside places nearby. My personal highlight was cliffwalking on Howth Island - it's at the other end of Dublin, but spectacular, and on the DART route, so easy to get to and back again.
The only downside for me - and there's nothing the hosts can do about it - is that it's situated at a major road in and out of Dun Laoghaire and there's constant traffic. BUT, and that's a very big double BUT: this means that your essential bus stop (46A) is just 100 metres away, and also you can drown out the noise almost completely by shutting the overhead windows.
Overall, this is a very nicely decorated studio with a stylish home feel (original photographs on the wall, books, aforementioned supplies). Highly recommended, and - certainly in and around Dublin - excellent value for money.