With due respect to Rick Steves' opinion, I just saw the "Emigration Museum" in Dublin. It's hidden underneath a shopping mall and appears to exist for the purpose of attracting customers to the stores. In my opinion, it's as accurate as a Disney film and as much a museum as Tomorrowland: lots of special effects, all virtual and nothing real.
On an only tangentially related note, my son and I grabbed several quick breakfasts and picnic lunches at the Spar stores that are all over the country because we found their deli to be surprisingly tasty. A sandwich made to order, some fruit and yogurt, and we were set. Don't pass it by simply because it's a chain.