The hosts a very responsive and I met Carlos, which was very kind. The appartement is nice, it's basically a space with a double bed, bathroom and a small kitchen. Good for 1 person or a couple. The location is great, you can walk everywhere or take metro easily from it.
Be aware that the automatic text messages in Airbnb when you ask for reservation are a little redundant. I received many texts with the same questions and I had the impression that the host did not really read them. Maybe the language barrier but still, a little bit annoying.
I was a little disappointed by it though. When I was there, it was missing a coffee pot and some basic kitchen stuff, so if you intend to use it as an apartment, you will have to buy stuff (like salt, sugar, laundry soap, etc.).
And if you are a 'light sleeper'', make sure to bring ear plug. You may not ear street noise, but you can hear all the noise coming from neighbours and the inside patio. The doors shut in a very loud way, so each time someone gets in or out, you ear the loud slam. You can also hear the people talking late at night (by late I mean after midnight), dogs barking early in the morning, etc.