Mundaka is a small charming port, with surprising cliffs and strong waves but also proposes great hiking routes in the UNESCO Urdaibai Biosphere Reserve site and a short drive away from Gaztelugatxe.
Josu's place is like new, impeccably clean and beautiful. The view of the square where the locals get together daily was great fun and the location is perfect, by the port and walkable to all.
Communication with Josu was excellent, and he has been flexible, helpful and present to help us in every step of our stay. He not only advised us on supermarkets, local bars, transport, txakolis, etc., but also upgraded us to a bigger apartment, which we much appreciated. Availability of washer/dryer was very handy as well as parking.
One caution: there are large windows without shutters. Despite the blackout curtains there isn't complete darkness, so if you need darkness to sleep well, take eye masks that shut off light. Given the proximity to the square, ear plugs may be good for sensitive ears.