This is a great place to stay. The instructions for self check-in were easy to follow. The apartment is so centrally located you can walk to a lot of cafés, bars, shops, restaurants, and places like Plaza Mayor and the famous chocolatier San Ginés. Uber rides to other places were typically between € 6-10. The place was very clean and everything was in working order. Note that the mattresses are very thin, about 4-6 inches thick max. The shower stalls are very small, I had a hard time moving around when washing my hair. But the shower size is typical for many apartments in Europe. The host was super responsive and when minor issues arose, he took care of them right away.