Sebastian strikes a great balance of being friendly and welcoming, creating community space if you want it, while also providing the privacy one needs.
A great aspect is the separate entrance for the upstairs part of the property so if it's late or early you don't feel like you're disturbing anyone.
The single room is basic but fulfills all the basic needs, as does the shower / bathroom.
You should expect a slight noise from the city, as you would expect from such a central location. I slept fine, but just for those who aren't aware.
overall a great stay