A friend and I stayed here for 2 nights on a quick stop in Madrid. The apartment is in the Lavapies neighborhood, which has some cool spots (Mercado de San Fernando and some yummy tapas locations). It's easily accessible to the center and other cool spots such as the La Latina neighborhood.
The unit is on the 1st floor (0 is ground). The apartment is as billed. The bed is comfortable (medium hardness) but the loft wouldn't be good for tall people -- thankfully, we're both short, but I still hit my head every time. And be careful coming down the loft stairs.
If you're a light sleeper, this place will keep you up at night. You can hear everyone coming and going in the hallways.
Shower was good and there is a washer if you need to do any laundry.
You do need to pick up the keys from a shop on the other street, but it's only a 5 minute walk to the unit. Overall, the place was good for our needs.