Thank you again Sean for your welcome and for your advice.
The flat is well located and near all the main attractions that Dublin has to offer. The flat is very quiet and clean.
However the flat is not suitable for 4 people, especially because the sofa bed is very uncomfortable and is falling into pieces + the boiler makes so much noise it is impossible te sleep in the morning when someone is taking a shower.
Except from that we had a lovely time here.