The host was very thoughtful and friendly, he even collected us from the bus station when we arrived. They gave us plenty of tips about where to go in San Sebastian and the best places to eat and I felt I could contact him with any issues we had (there were none though).
The apartment was perfect for our stay, it is in a great location, very close to the beach and on a nice quiet street with plenty of shops and cafes around. The apartment was well decorated with everything you need. It's comfortable and very clean and I couldn't recommend staying here enough. San Sebastian is wonderful!