Loft is very well located, near restaurants, the metro, and shopping. Salamanca is an amazing neighborhood, safe, and very walkable.
Just one minor issue; I echo what others have said, the loft is located on a first floor, thus it gets noisy when people enter or leave the building during the day; if you plan to come to spend a considerable amount of time inside the loft to do some work for example, I recommend you go to a cafe or a quieter place; if you plan to stay outside through the day and just come to sleep, then you should be good; nights are quiet, the bar next door is only noisy on Saturday nights, other nights I didn’t hear any noise and I was able to sleep well.
Other than that, I recommend this loft to anyone looking to spend a few days in Madrid to explore this amazing city.