I had a nice stay at Ainara's. Didn't get to meet her personally but even from abroad she was very reactive to my messages and very helpful.
Just want to point out that I found the room (and generally the flat) much smaller than it looks on the pictures. It wasn't such a problem in the end, but it was a little bit of a shock upon arrival.
I was there in January and the place was quite chilly, especially at night.
I would advise to discuss conditions of breakfast with the hostess before booking, as she doesn't seem to provide it all the time. You wouldn't want to pay for something can't enjoy.
Apart from that the flat is ideally located, close to shops and transports, but very quiet at the same time. Nice and comfortable bed too.