The photos here don't do justice to Conor's place. It's such a sweet, organized, cozy house. The space is great (I especially liked the kitchen), and there's nothing to complain, really. The guest bedroom is small but also perfectly fine.
It's pretty easy to go from Conor's place to the city centre; there are three bus lines with a stop nearby (but one should have in mind that the Dublin bus timetables should not be blindly trusted!). A taxi ride doesn't cost that much, either.

Conor is the best host one could ask for: kind, nice, and humorous. He gave me all the information I needed, besides being excellent company when available. It was my first time staying at a private room in somebody else's place, and my experience couldn't have been better. I'd recommend Conor's place to anyone visiting Dublin; and I hope to stay there again some time in the future.