We were 4 adults. We had a good time in this appartment. Perfect for our needs (basically have breakfast, dinner and sleep). Very close to Guinness museum, quite a treck from the rest of the center of Dublin, aprox 30 minutes (sometimes a bit less, sometimes a bit more). However we knew this before going, that is why the price was lower than any of the ones right in the centre that were available at time of booking.
We would go back to stay here if we go back as 4 people.