We visited Dublin during what I believe is the high season, with many tourist and the town centre being extremely busy.
easyHotel Dublin City was the perfect choice for a comfortable and low budget stay. The rooms are small but it has everything you need for a short stay to the highest standard. Super clean, comfortable beds, black out curtains, nice shower and brilliant service provided by the reception and so quiet. It is located on the north side of the river, away from the bustle and noise, but just a short walk from Dublin's main train station, shopping and tourist attractions.
Highly recommend.