I have had good time in Gisselle' flat. I have had room without window. For some people it might be issue but not for me (I was off the flat from 9:00 am till 9:00 pm). Place close to Metro, few restaurants, Park el Retiro, The Museo de Arte Reina Sofia, Museo Prado.
I have asked Gisselle could I leave my bag and collect in the evening as I had late bus to Barcelona and she had no problem with that.
Thank you for your hospitality