I wouldn't recommend booking it for more than a couple of nights. I booked it for 2 weeks whilst I was trying to find a more permanent apartment in Madrid - I only stayed 6 days because not being able to use the kitchen was frustrating. Vanesa didn't give me a refund for the remaining days when I wasn't there.
Vanesa made very little attempt at being hospitable, and the room was dark and smelt of cigarette smoke.
However, the room and bedroom were clean and the location is quite good. Has a dog and a cat so be aware of that.