We stayed at Jj's for a weekend break in Bilbao and had a great time. Communication was quick and Jj checked us in with lots of advice and local tips. He was very helpful throughout our stay.
The flat is up a short flight of stairs but has a lift after a few steps up. It looks even nicer in reality than the pictures. It was well equipped for what we needed with sower supplies and adequate cooking utensils for some quick cooking whilst we were there. There are bars and grocery stores on the street so everything is very convenient. The pinxtos in the bar downstairs were really yummy, as was the wine. We were able to walk to everywhere easily so it was well located for getting around Bilbao.
Would highly recommend.