In terms of location you couldn't do better than Buswell's in Dublin. 5 second walk to Dail/Leinster House (not that you might visit it but nice to have a historical building that close), National Library and National Archaeology Museum 10 seconds, St. Stephen's Green 1 minute, Grafton St/ 2 minutes, Trinity College/Book of Kells 4 minutes. You get the idea, great location.
The staff were very friendly at all times of the day. The room was bigger than I expected and very clean, comfortable and well equipped. Breakfast was good, continental and cooked included. The overnight parking just around the corner included in the price was also a very nice bonus.
There were just 2 of us this time and it was ideal. We asked about family rooms and here they are limited. One triple room and a number of rooms where a fold-out bed could be added. Still if you get one of these rooms I would recommend highly for a family with young children.