I wholeheartedly recommend David and the Coach House. David greeted us in person when we arrived (guiding us over the phone as our taxi approached) and he could not have been more gracious and welcoming.
He showed us the house, explained doors & locks, the appliances, and so on and he also gave us pointers regarding local options for food and drink. (For example, David recommended the Canal Bank Cafe as a breakfast spot; we went there for breakfast and it was superb.)
I have to say that the Coach House was not exactly as advertised, but only because the photos don't do it justice; it was modern, light and airy, and it suited our party of three to a tee.
The next time that I'm in Dublin with friends or family, David & the Coach House will be my first choice for lodging.