The best thing about Xavier's place is the location. It's a 2 minute walk from the Arc de Triomphe and its metro station, a 20 minute walk from La Rambla and an even shorter walk from the Sagrada Familia and some great neighbourhoods.
The room itself is basic but comfortable, and the bathroom is shared with occupants of the three other rooms. You can also hear noise from the next-door room rather easily. But aside from that, everything was clean and the shared areas were lovely.