The appartment is huge and very well-equipped. The appartment is located in Triana, but not in the most central part although there are several good restaurants and shops just around the corner (the tapas bar in downstairs is highly recommended) and a big supermarket across the street. Incredible view from the balcony overlooking the cathedral and the Giralda. It was sunny until midday. It takes about 30 minutes to walk to the cathedral. We were travelling with a baby, which was without hassle. Since we visited in January however the floor was ice cold. We had to turn off the AC in the bedroom during night as it was too noisy. But these were the only small incoveniences.
Diego was an excellent host and was meeting us when we arrived as agreed, and had even done some light grocery shopping for us. Likewise for the checkout, on time and without hassle.
Overall highly recommended!