We hadn't a great stay at Paul's apartment. It is roomy, clean, and a short walk from the spire and the main shopping street. It was also well equipped with muesli, corn flakes, tea, coffee and even fresh milk!
The location was generally good, close to O'Connell st, but it was a bit of a walk to get across the river to the temple bar/college green area, which seemed more quintessentially dublin IMO. The lighting was a bit sad, the pictures make the apartment seem more well lit than it is. And it is on the ground floor, so you always have to have the lighter curtains closed or else it feels like you're in a fish bowl. It was very loud, being on the ground floor we could hear people's conversations walking by on the sidewalk and in the apartment corridors. Bring earplugs for sleeping. And something really should be done about the uncomfortable bed...it was a spring mattress that seemed very old and the springs poke at you. The bedding seemed cheap quality too, scratchy polyester.
Overall, this is a good apartment for exploring Dublin. It is an 'airbnb' apartment, so things tend to be lower quality than you would see in a 'real/live-in' apartment. But if you go in with this in mind, I think it is a good value apartment in Dublin within walking distance of most major sites. I gave 4/5 stars mainly only because the bed was uncomfortable, but we really appreciated things like the breakfast amenities.