The place is very easy to check in thanks to the remote Bluetooth locks. It's very well located, many stores just in the doorstep. It was extremely clean as well, and everything looked brand new.
the place is smaller than I imagined, it's the size of a tiny Parisian apartment, but very functional. the window are very small with not much view but that's also fine.
if you're coming by car, you can park at Parking Lavapiés - Casino de la Reina Empark. it was 49 euros for 2 nights, and very clean and felt very safe and big enough for a large car. other parkings are closer but didn't feel safe to me. In most of them they also force you to leave the keys of your car with them so they can move your car around. We were in a road trip around Spain so parking was a big concern for us.
Thank you again to Carmen and Jacobo.