We've just returned from a lovely, long weekend in Seville, having stayed in Marc's flat. It is a beautiful, simply styled flat with lots of thoughtful touches. It's a big flat for two, decent sized flat for four - plenty of storage and lounging around space. The sitting/dining room is large, high ceilinged and cool. The floors are a beautiful white marble throughout (except shower room and kitchen). Very comfortable, big bed. No TV - yay! Good Wifi.
The kitchen is small but amazingly well furnished with a washing machine, tumble drier, fridge freezer and dishwasher - as well as full hob and oven, and everything needed for cooking up simple meals. Marc's also provided a decent hairdryer (2200W - for those that it's important for!), so save your suitcase space for souvenirs.
Location is great - right in the middle of the old city centre - so everything is in easy and quick walking distance. The narrow streets of the old city don't get full sun, so at this time of year (early November), we needed a thin jumper while walking this area. More open areas and plazas were warm enough (for us Brits) to just wear shirt and trousers.
Some people have suggested that the old Jewish quarter is noisy at night - this is due to the narrow streets flanked by tall buildings, amplifying any sounds; rather than due to there being lots of people out partying through the small hours. I'd recommend ear plugs if you're a light sleeper, wherever you stay in the old city.
We'll definitely revisit Seville, and stay at Marc's flat again - perfect. Thank you Marc.