Okay, it was my first time in Madrid. So, I lowered my expectations. The city after 10 PM smells like piss.
What's wrong with the apartment? It's ok, but the district is totally unsafe due to a lot of immigrants trying to sell drugs along with trying bull any white-skin person in a district, so, I definitely do not recommend to staying in this district.
Despite the district critical issues, the check-in experience was good.