We stayed at apartment 4 in particularly cold weather. The apartment was easy to find and check in early was particularly helpful as we had an early flight (thank you).
The area is "up and coming" and close to a Tesco and deli/wine shop etc so nice if you want to take food back to the apartment. One day we got a tram into Dublin (the tram stop is about 10 min walk- Cowper) but we preferred to walk into the City Centre as there's nice coffee shops/shops on the way. There is also some nice little bars within a 10 min walk of the apartment- we particularly liked The Bowery (good rum menu and live music).
The apartment has everything you'd need for a few days and the bath was particularly welcomed after a day of walking around in the cold. The only slight down point was the heating was only turned on for 3 hours in the morning and 3 hours at night (turned off 8pm) so it was often a bit chilly when we arrived back later. There was a fan heater provided to warm the room up but we only had this on for a short while and turned it off when we went to bed. As I say, it was particularly cold the weekend we went to Dublin (2c) so it may not be an issue when it's a bit milder.
Please note there's no Tv in the apartment (to my boyfriends horror).. but there is wifi available.
Overall the flat was good value for money, thank you Tom