For the price, it is a good deal--if you're not looking to spend much time at the place. It was clean and having a private bathroom is nice! The location is great as well, it's near a popular tapas/wine bars street and 8-10 min walk to the Metro.
The only thing that I think should be more emphasized by the host (it is in the listing details) is that you cannot use the living room or kitchen area. It's misleading since there is a photo of that area on the listing... and when we checked-in the guy showed us that area and let us sit on the couch (and didn't mention that it is off-limits). Basically you can only sit in the room or use the private bathroom.
Also, during our stay... there was another woman living there and she accused me and my mom (who is over the age of 50) of having a party and inviting people over at 2am. We don't drink alcohol, and we didn't invite anyone over...
If you're looking so someone very affordable, and you don't plan to relax/hangout in the airbnb (and you're very quiet during the night) this is a good option for you.