We spent a week-end in Rachel's flat where we had a great time. It is large enough to accomodate 7 people and very comfortable.
There is a bus which easily connects you to the heart of Dublin (less than 15mn) so it's the perfect deal if you are small group for a week-end!
In addition, we got a very warm welcome from Rachel's sister, despite our late arrival (11pm), who gave us all the information we needed. The check-out was also very flexible, we were able to leave our luggages in the hallway in order to enjoy a last city tour before taking our plane.