I was in the flat from the middle of November to the middle of December. The host is a kind and supportive one, who helped beyond the scope of hosting questions.
The sink is 76cm high. The shower enclosure is 65x65cm, the height of the shower head from the tray is 168cm, can't be adjusted. When the temperature outside was about -1°C, the living room was +15°C, the bed room was +8°C. The heaters make the rooms warmer by 3-4°C for 40-50min. You can use a hot bottle. It's silent and has blackout curtains, allowing to get enough sleep. It's bright if you open the curtains.
The kitchen is well equipped for cooking, including basic groceries like salt or oil. There are interesting surroundings. The bus stop is in 7-12min walking. Laundries are near the bus stop in about 1-3min walking. There are a couple of grocery stores next to the laundries. The buses can bring you the Temple Bar area in 20-60min, depends on the traffic. 3Arena can be reached from there by a bus or 30-40min walking.