It was really great staying at Tom's place, and I would recommand it to everyone! The room is exactly like on the photos, the beds are comfy and even if there's no proper kitchen, there is a microwave, which is handy. The all thing was really clean.
It's not far from the city centre, there is a bus stop right outside that will take you there in 20 min.
The only inconvenient thing was the shower. It's quite impossible to take a shower without flooded the entire (!) bathroom.
Someone was waiting for us when we arrived, even if we were late, that was really nice! And when we left, we let the keys in the letterbox, very convenient too.
I really encourage you to stay at that place if you're looking for a nice place while you visit Dublin.