I took my last minute booking at Mercedes' place and it was better than expected. Flawless and very quick communication with host, lovely and super clean (!) apartment with comfy and stylish living room (though the bedroom itself was quite basic - but everything we needed on our one night in Seville). Very good wifi! Great location, e.g. 20 minutes walk to the Cathedral, same for Plaza Espania (or 5 min by taxi if you're tired :). Big supermarket just around the corner. I'd totally come back next time I'm in this beautiful city.