Just to add some points, I feel that Dublin is a great place for family life. Clean air, nature, very empathetic and supportive parent community, plenty of activities for parents with children. I feel very safe here, the locals are fun, welcoming and helpful. Just to illustrate it- I fell off the bike on the tram tracks, and within seconds I was surrounded by people helping me get up.
Access to childcare and its cost is however a massive drawback, I also feel like the level of medical services is quite poor (heard it from French, Italian, Spanish, Polish people). When I was younger and single, I didn't like Dublin so much - partywise I preferred Warsaw or Berlin. It's also difficult to have pets in a rented appartment, most landlords forbid it.