It was great to stay at Olaia & Marcos, they were very friendly and helpful. The apartment is beautiful and clean in a very central, safe area with lots of nice bars and pinxtos nearby in walking distance to Guggenheim and metro. The room with twin beds was just what my friend and I needed a space to sleep well and use as a base for day trips around town and countryside. It was nice and quiet at night (no traffic or noise from the street) I would recommend their place for sure.