Pros: Mario was super friendly and responsive and even told us of a great little cafe to grab lunch near the apartment! Location of the apartment is far enough away from central Dublin to provide a quiet night's sleep but close enough to easily walk to everything we wanted to see (it's right in between both the Guinness and Jameson facilities)! Apartment complex & neighborhood seemed safe.
Cons: The room is very small so not much room to move or pack/unpack suitcases. The shower is incredibly small and that's coming from a rather tiny lady so I can't imagine a larger/taller person would be able to shower very easily. There were some plumbing issues (if someone flushes the toilet you'll have to wait a good 10 minutes before you can flush again & shower ran out of hot water after one shower.
Having said all that, if you're looking for an inexpensive, quiet, no frills place to crash while spending the majority of your time out and about exploring, this would work for you!