That area is served by bur routes that have had to be curtailed due to anti-social issues in the past. I'm not sure where exactly the issues were occurring, but it would be advisable check the area out a number of times and at different time of the day to get a sense of what it is like.
Drop into the local Garda station for advice on your chosen address on an off the record basis, some parts of Tallaght are fine, remember it is the size of Limerick.