I currently live very close to Arthur Griffith Park so, while I can't say much about how it used to be (I'm only here just over 5 years), I can say that it seems pretty okay now. While the area is corporation/ex-corporation it is a very mature area, and is in a very convenient part of Lucan (a couple of minutes from Superquinn, and at the start of the 25A route, which means you'll always get a seat on the bus, even at peak times). It's also quite small compared to the massive, sprawling estates shooting up around the place.
As a couple of people mentioned, it is very well maintained, and does seem to have quite a good community atmosphere. Every now and then you see a lot of people from the houses out weeding and looking after the flower beds in the common areas. You know, if you like that kind of thing ...
Some of the terraced houses do look a little small (from the outside) and, given that they're old, may need work/refurbishment but if I was a ftb in Lucan with a limited budget, I'd definitely try and get something there rather than further out like Foxborough, which has a lot more kids hanging around, and a lot less going for it.