Absolutely the best location. We could quickly walk to all the beaches, restaurants, and Old Town. There was often live music close by and definitely plenty to do. It was a 13 minute walk to our Spanish Classes at Lacunza School. We even found some nature hikes just blocks away. The tap water is great and we filled our water bottles with that water every day. The apartment is spacious and comfortable. There are blackout blinds on all the doors and windows if you like to sleep in. The area is super safe, and I never had concerns with my 16 year old daughter being out late with her friends.
Juan was super communicative and is close by to resolve any issues. His English is good and he was very helpful.
There are a couple of things to be aware of. There is no air conditioning, so it can get warm in the apartment during the day. But we just opened the windows and turned on the fans at night and it would cool down. The street noise can get loud sometimes as there are bars and restaurants close by. But that didn’t bother us much, as we were usually out late in the warm summer nights partaking in the festivities.
I would definitely rent this apartment again on my next visit to San Sebastián.