I’ll divide this into three sections.
Firstly, Javi is a great host. Plenty of advice about finding the place and he met us on arrival. Checked we were ok several times and responded to our queries very quickly.
The apartment itself is just as described. Well kept and equipped. Spacious and comfortable. It is up two flights of stairs but there is a lift. We’d happily return to it.
Finally location. The Town Hall and river is a 5 minute walk but down a long flight of steps and also up them to return. There is a lift though for 50c. Bilbao centre is quite small and we walked most places. The Guggenheim is around 20 mins and the Old Town 10. Literally next door is a supermarket and 2 minutes away there is Metro Station and also a bus that goes through the city centre. Only downside is a lack of a local restaurant but there are some local bars. Bilbao is worth a visit and this place is a very good place to stay and good value compared to some places in the old town.