We stayed here for four nights with a one year old. The location was just amazing. We were within (stroller friendly) walking distance to all the shops, restaurants and attractions. And what a pleasant walk! Pedestrian-only streets filled with young people, plazas buzzing with local life, all in front of the beautiful historical architectures and organic urban fabric.
The unit was well equipped and maintained. The host was very responsive to communications, once helping me figure out how to operate the stovetop after hours. Traveling with an infant was not easy, but this really felt like a home away from home. I highly recommend this place if this is your first visit to Seville!