Me and my girlfriend decided to stay with Vadym's during our time in Ireland.
Location is great, having in mind Dublin is not so big and you can make your city tours just by walking. In addition the airlink bus stop is 10 minutes hous, tram stop is just outside the apartment house and Guinees storehouse is just 3-4 min walking (around the corner).
Most of the Dublin landmarks, city center are 12-15 min walking.
Accomodations are great as well.
It is clean, you have wi-fi connection, storage to place food and everything you need.
Certainly Vadym's place met our expectations and we will be very glad to get back.