We had a great stay at Nieve and Alf. Alf was so kind to give us information about the city in english, since only one of us speak Spanish. We had a small breakfast in the flat in the morning, and even if the flat is not located directly in the center, taking the public transport was easy and cheap, using the help of our hosts to obtain a travel card. They were very nice and can be recommended for visiting Bilbao.