I lived just outside of Dublin for almost a year about 10 years ago. It was amazing! I was lucky enough to get a work VISA and was working in a classy hotel. I spent 2 weeks up in Belfast, Northern Ireland, and had no issues at all. The only thing that was strange was that on Sunday's everything was closed! It's not like that in Dublin! If heading up to Northern Ireland, it's worth taking a tour up to the Giant's Causeway ~ stunning!!! The tour that I took also stopped at a distillery, which was equally amazing, for other reasons! lol Definitely go to the Cliffs of Moher, and if renting a car, drive through the Connemara, in County Galway. Such a strange and beautiful place. I never made it down to Limerick, but I did go to Cork , which is lovely....basically, the entire Island is AMAZING! Cannot wait to take my family back there for a visit! You'll have a blast!!