Stayed at this airbnb for four nights. Checkin was easy. The location is great - super convenient to several metro stations and Gran Via.
The apartment is on a small street, but there's a lot of people hanging out on the street during the day, smoking. You don't get much street noise at night, but there's a fair amount of building noise - doors closing loudly for instance. One of the nights we were there, someone was moving out of the building until the wee hours which was quite loud.
The other thing to note is that the luggage storage that's offered for early arrival or late departure is not on-site. It's a few blocks away and at an additional cost.
Overall, it was an easy and acceptable stay, but it feels very corporate - not personal like other airbnbs I have stayed at.