Super cozy, clean and overall great apartment for a short stay! It's very central, you can easily walk everywhere but if you want, there is also a super near metro station, just like 5min from the apartment called Lavapies.
The beds and couch are super comfortable. The kitchen has everything you need and even some food supplies like tea, coffee, cookies and stuff. Which is really great!!
The house has weating and an air conditioner in the living room that can cool both rooms, which was great since Madrid is so hot in summer, even at night.
Our only complaint is the bathroom, which looks like an afterthought compared to the rest of the apartment. It's awkwardly accessed through the kitchen (right beside it), its sliding door doesnt have a lock and it is super tiny and cramped. I imagine a big person would have troubles sitting on the toilet because it's cramped to the walls with close to no leg room.
But despite of that it was still worth the price for the cleaniness alone :)