Sonia's apartment was ideal for a weekend break. It's not a large place, but ideal for 2 people - exactly as it appears in the pictures. The apartment was light and clean, bed comfortable, and shower etc. worked well.
We didn't do any cooking as we were only staying for a weekend - if you are planning to cook, bear in mind that the kitchen is tiny. Having said that, there is a table and chairs in the apartment.
The location is amazing! Right in the heart of old town and perfect if you are planning to sample as many pintxos as possible during your stay.
Check in was simple - I was contacted by one of Sonia's colleagues via whatsapp a couple of days before the trip. We arranged to meet at the apartment at 3pm and she was on time.
No complaints - would definitely recommend Sonia's apartment for a weekend away in lovely San Sebastián!