We loved staying at Kevin's flat. There were 10 of us so it was a bit of a squeeze, but everyone had a bed and was comfortable.
The location is truly amazing - 5 minutes' walk to the heart of Dublin. We didn't use public transport once over the weekend, as everything was in walking distance. Because of its centrality, it does get a bit noisy at night (there's a pub opposite the flat), but for me the buzz was a positive and I was able to sleep fine.
Kevin made us feel very welcome. He was also on-hand for help/advice throughout the weekend.
Great flat and totally recommended!