We stayed in Apt B which overlooked the street below, it was spotlessly clean, very well equipped with comfortable beds, good showers and a modern vibe in a very old building - a really good conversion.
The reviews that mention the street noise are correct but this is the best part of the old town, Santa Cruz has it all and you are right in the centre of everything here. If you were in one of the many boutique hotels the noise would be the same and you would be paying probably double. The atmosphere is relaxed, bars and restaurants a plenty and everything worth seeing is walking distance from here - it's perfect for a short break in the beautiful and historic city of Seville.