Location, location, location. It's the location that makes this place great, and the parking. The apartment itself is nothing special - furnishings are mismatched and older, walls are bare - but we were just there to sleep so it didn't matter. Bed was comfortable, shower was good.
It is located in the old section of Sevilla (so you can walk anywhere) where the streets are exceptionally narrow - a challenge to drive and park. We had the French doors off the bedroom open for air, and it was noisy with foot traffic, but that settled by 11 or so.
Check-in instructions are detailed, though it was hard to find the lock-box with the keys (tip: if you are coming, you'll find these at Conde de Ibarra and San Jose/Virgenes).