If you are travelling with some friends, staying at Kristy's a good option, you have the city center just 15 mins away by metro and the metro stop is just @ 10 mins walk. Just to have into account (as Kristy explains very well) that is a 4th with no elevator and that they have a very beautiful cat that lives also there, importatn to know if you are allergic/don't like pets. There is only one bathtub to share between 3 rooms so it could get busy if everybody takes it showering time in the morning.
It was a nice stay.