It could be clearer as to where you need to go to check in. Despite being called O'Connell Street Apartments, you actually have to check in on Parnell St (at The Gate Hotel)
But after finding the reception, check in was easy. My apartment was 2 mins walk away.
The apartment appeared brand new. Very clean, with tea, coffee, bottles of water, and even a selection of biscuits supplied.
Three bedrooms, two had double beds, one had a double and a single bed. Bedroom at the front of the building can get noisy at night as it looks out over the street, but I'm a light sleeper and it didn't bother me too much.