The space is really cosy, calm and confortable; fully equipped, actually a flat for you to get the vibe of living in Madrid.
The area in which it is located is very calm, with cafes and restos right there. It is very close to El Retiro, has Anton Martín metro station a few seconds away, but i recommend walking to La puerta del sol, la Grab vía even Plaza Mayor, should be 15-20 min walk, could take longer if you want to look at details and breath a little.
Location, space and host fully recommended.
Pd. Peralta has different spaces, should look at them and see what suits you better)