We really enjoyed our stay at Nani's. It is not modern, it does not have the clinically clean finish of a modern apartment and it definitely not designed to be let out. Instead it allows you to live like a local in a cool, interesting space with some everyday quirks. We really appreciated the art, books and overall feel of the place and just felt right at home here. The terrace is superb and warm enough to bask in the sun even in January. It is rare to get a private terrace in Seville especially at this price but this is exactly what you get and it's such a great feature.
The shower was a little small for me 6ft2 but was very hot. The house is warm with a good heating system and the bed is extremely comfortable, probably the best we've ever slept on in fact!
Overall I'd say book here if you like a quirky place that isn't perfect and has its eccentricities but which just feels like it has a good, laid back vibe.