If you are on the fence about going to San Sebastián, do yourself a favor and book the trip. I cannot recommend the city and Juan's place enough. He is perhaps the most attentive and nice host we have had. In addition to the doc of suggestions he sent in advance of the trip, he also gave us tips on a place to find a jacket for my husband (he's 6'4").
The balcony is reason enough to book this place. Two bathrooms is a bonus. Comfy bed, plenty of towels, toilet paper, paper towels, etc. Added bonus of provided umbrellas and snacks: txakolina, tuna and peppers.
We walked almost everywhere but there is a taxi stand across the street. Tip: If you have an early flight, prearrange a taxi. I was able to order one in my broken Spanish, but I bet Juan would help if you tell him in advance. He is the absolute best.