Tony is a terrific host, even going so far as to pick me up from the Killiney DART station, and dropping me off the next morning at the airport bus stop. His Georgian house has been rather beautifully re-interpreted with a modern glass roofed space tying the old front of the house to the new addition at the back. I had a good evening of conversation with Tony - he has a great many interests, and wants to engage with his guests. The guest bedrooms are tastefully appointed and comfortable with everything a visitor needs.
If you're staying, it's worth climbing to the top of Killiney Hill where there's a spectacular view out over Dublin Bay, Dun Laoghaire harbour, and Bray Head to the south. Killiney is within easy reach of Dublin on the DART train.
I'd highly recommend this airbnb listing.