A perfect little apartment for 2 people. As a couple you can share the double bed, or if you are separate, as we were, there is a nice spare matrass and enough blankets pillow etc to make yourself comfortable. 3 people could stay as well but I think it will be quite tight.
The apartment is in a quiet complex which is good for sleeping, but the party area, Temple bar, is only 5 minutes away which is nice.
The house is very clean and well taken care off, but since dublin has a lot to offer we didn't stay inside the apartment too much.
All in all a place I recommend.