I've been at Nelsons places several times now. What I really like is not only the apartments but also the wonderful attitude, he treats his guests with. Nelson is really caring and tries everything to give you the utmost of your time there. Whenever you need something, he is there. He replies rapidly fast (also late in the evening or on Sundays). I'd always recommend the places in Atocha to stay. It's safe, extraordinary clean and the apartments are well equipped. Can't wait to be back soon.