Marco and Maria's apartment is ideally located for City Center action, close to the Liffey, in comfortable walking distance to Temple Bar, Trinity College, Guinness Storehouse, and to the "locals" neighborhoods to the south. (Whelan's was a nice walk and offers some great music from touring and local musicians, by the way.) The Hop-On, Hop-Off bus routes, and city bus routes pass by the building, making public transit an obvious winning option.
We struggled with the WiFi in the apartment, which was via 3G/4G cell data hot spot. I'm not sure if we hit the bandwidth/data limits, but at times it reported connected, but no Internet access.
The apartment is minimally furnished, adequate for folks that are going to be out on the town exploring. However, if you end up inside due to weather or just wanting to relax, it's not really equipped for that.
Rosie's Cafe, nearby, made a delicious and affordable breakfast. We also ate nice meals at Darkey Kelly's, Dollard & Co, and The Old Mill.