The best thing about this listing is the location. It is right in the center of town and you can just walk to almost all the typical spots in Dublin from here, easily.
The apartment is fairly ok, 4 people can stay there quite ok as there is room and sleeping accomodation for 4. However, I must say that the actual apartment is not like you see in the pictures. It appears to be very modern and new but in fact it is a bit run down. Everything that is shown or described is there, but it is all just a bit old and banged up. Everything is usable and the bed/sofa are relatively comfortable, but it was not what you'd expect from the photos, so in this sense we were a bit disappointed. It was also quite humid there, but this improved when we turned on the heating.
Other than that, communication was good, we got answers to our questions quite quickly and check in and check out was simple.
All in all, an ok place to stay. You will be basically paying for the location.