I was a little nervous about this place because of the comments, but we had a very pleasant experience staying here. Would have stayed longer.
The house is big and the room has a pretty good size too, with a big closet. The chairs in the room are comfortable too, which we appreciated since we work remotely. The kitchen has everything you might need. There are three rooms besides the host's, but during our stay, only one of the rooms was occupied.
Because we work, we spent a significant time of the day in the house. It never felt crowded, or that we had to wait to use the shower or anything.
The location is definitely not central, but the daily commute is definitely worth it given all the money you save staying here.
It is true that the place is not the cleanest or tidiest, but it is not that bad either. Our only issue was that the place was a little cold, but this seems to be a general issue in Dublin (the heating works, but the windows are not appropriate for the winter).