The check-in was super easy and done via an app. We arrived around 10 pm and it was no problem getting into the apt.
We didn't need to take an Uber except from the airport and back. everything was within reasonable walking distance from the apartment.
The area has a very ethnic vibe with a lot of African and Asian stores and restaurants. We went to chuck chuck chicken for a quick bite the first night which was 2 minutes away and the chicken was really good and the owner was super nice. The next morning we went for brunch 3 minutes away. Reina Sofia was like 10 minutes away. There are also plenty of supermarkets nearby.
There was plenty of hot water to shower. You can't hear anything from the neighbors or street so it's really quiet and nice when you are going to bed. It was pretty cold in Madrid when we were visiting but the heaters in the apt worked really well.
As a tip bring an HDMI cable so you can stream on your laptop and display on the tv. wish we had thought of that.