This studio apartment is located in a good neighborhood and is close to the Nation metro station and to bars and restaurants. Also, it's on the ground floor which is a plus. It's very secure, requiring a keyed-in code for two doors and then a key for the apartment.
The host -- alternately Ruben or Carole -- were very responsive.
Also, the place is quiet and the other people in the building are very friendly.
I have to say that the wi-fi in the unit is quite week and I couldn't get phone coverage (using the Orange network) when in the unit and had to step outside to make calls. I had the host reboot the wi-fi router and that helped, making it usable although still quite sluggish.
But I'd say it's a good deal for the money, and I would definitely recommend it. But if wi-fi and phone are very important you should check to see if perhaps there have been improvements.