It was great! The apartment is close to the city centre but a bit outside from the touristic centre. The most famous sightseeing spots (and also the beach) is easy to reach by bus/metro - usually it's a 20 min bus ride in every direction.
The room looked exactly like in the pictures and yes, you can hear the street noise but after spending the days shopping/ sightseeing/ partying we fell asleep without any problems. But if you're sensitive to noise I'd recommend Oropax.
During our stay, there was another couple staying at their house for just a night but that wasn't a problem at all - also nice people and rarely saw them; and since there are two bathrooms, also no troubles here.
Patxi and Dani welcomed us with warmth & spanish hospitality. They are very open and easy to talk to. We had a great stay and we'd love to come back someday! Thanks for everything :)