Highly recommended! We stayed almost a week with two kids in Josune & Césars apartment and it suited us perfectly. The apartment is in a nice and friendly neigbourhood on a quiet street, with several supermarkets, fruit and vegetable vendors, pharmacy, bars, playgrounds etc nearby. It's a 10 min walk to get downtown (a little bit more with kids, obviously, but we're used to that). There are also a couple of bus lines serving the neighbourhood and a bus stop just around the corner, but we ended up walking most of the time, as Bilbao is such a lovely city to just stroll around in. Getting to the apartment from downtown on foot is an uphill walk, for sure, but unless you limit your visit to Bilbao to the very central parts you're going to do some uphill walking anyway and we really liked strolling around in the Zabala/San Frantzisko neighbourhood. We found Josune to be a very kind and helpful host. She gave us great recommendations on things to see and do, helped us arrange a taxi when we were leaving for the airport, and even offered to meet us at the airport bus stop on arrival to show us the way to the apartment (although we ended up taking a taxi all the way). All in all, we had a great time staying in Josune & Césars apartment and we would love to stay here again when we visit Bilbao next time.