If one spends a couple of days in Ireland only and wants to get away from the "big city" Dublin, then the Howth-peninsula less than 10 km away from the city centre is the right choice. It is a tranquil place at the seaside with lots of green and nature around.
Margot's little cabin next to her house contains everything and is well equipped and suitable for a short stay of two people. If you are tired of restaurant food and bar meals at the pubs you can go to the big supermarket in Sutton, around 5km away from Margot's property and get a superb selection of Irish comestibles (cheeses, hams, breads,...) and wines from all over the world at a fair price. A car is useful but there is also a regular bus connection into town. The local pubs are in walking distance - one uphill and several others in the village downhill.
Check-in and -out is uncomplicated and the hosts are invisible. But
Margot and her husband are great people who really take good care of their guests: they gave us lots of useful hints and one of the few remaining hiking maps for the Wicklow Mountains and Glendalough so that we could get there and back without problems.