For us the location of this apartment was just great. The apartment block was safe, but smelly and quite dirty. For seven the space was sufficient. Although we organised ourselves quite well, It was a pity the host couldn't appear to give some tips and explain some stuff, like hot water and tv. On our last day, we were almost locked in from the inside and in the meantime warned the host to fix the front door lock!
The public bus 123, almost in front of the block, brings you very quickly to the South/Trinity area. We used a Dublin freedompass for 3 days (33€) which included the green dodublin hophop bus. Without the hophop choose the LEAP ticket, which you can buy at the airport (20€ for 3 days) and also includes the luar and dart lines! The Murray pub close by was just great for food and (life) entertainment.
Due to Ophelia hurricane there was no public transport on our last day, so we took the taxi van (max 8p) back to the airport for 40€. The guy is called Billy and provided a smooth service (00353 872819480)
As far as the apartment matters, our experience was just fine, but could have been better!