We loved staying here. Great location and the beds were really comfy. The El Arenal is literally above the food market, which is only about half full these days but the stalls in there had some quality produce and there were a couple of great restaurants/cafe in there too. The best shop is literally just by the front door to the building , great for strawberries and oranges that were in season !
Oh and in the market you can hire a bike for €10 a day from in there. You are also literally across the bridge from Triana where there is a more bustling market.
It's a 10 minute walk to the key monuments with loads of great places to eat on the way up there.
As this apartment is on 4th floor you get a great view of the Cathedral and the windows slide open so you can sit in the sun! We'd go back definitely.
The only bad side was the downstairs neighbour was suffering from an awful cough that we could hear in the night sometimes, but hopefully (for everyone) that'll get better! There were some homeless people living around the building but that wouldnt stop me staying here again.