My boyfriend and I visited Madrid for a couple of days and stayed at Maria’s place. Check-in was easy. Someone met us there to let us into the apartment and though he didn’t speak much English, did his best to let us know about everything we needed inside the apartment. Maria was unable to accommodate an early check in (we arrived in the city at 10am), but there’s a luggage storage place a few blocks away, which was convenient. The apartment is located very close to the Atoche train station, so traveling to all the sites was simple. Ubers were also VERY cheap (at least compared to NYC🙄). The apartment was just a bit smaller than I expected, but was just fine for just the two of us. The kitchen was fully equipped and the TV had Netflix. The bathroom was nice, but the shower was annoying since you couldn’t use it on full pressure or it would flood the shower and the bathroom floor due to no real shower door.
The location was convenient for travel, but if you’re looking for a bustling street, this isn’t it. But again, a quick train ride or Uber can get you anywhere fairly quickly. I would do it again. :)