We had a fantastic stay for nearly a week. The place essentially operates as a hotel without a full time concierge or daily cleaning services.
The location is fantastic with all sites in Seville within a 15-20 minute walk. There are grocery stores nearby. A couple of buses stop right near the building and a taxi from the train station or the Plaza de Espana area only costs EUR 5-7.
The unit itself was very clean and had all the amenities you could ask for - fridge, freezer, stove with pots, pans and dishes, dish washer and washer/dryer.
On our next trip to Seville, I would not hesitate to stay here again!