Marco was a great host! Although our plane arrived late and it was quite some delay in traffic, Marco waited for us and met us with a warm welcome. He showed us around the house, which looks exactly like the pictures, only better if not: well stocked with facilities in all rooms including the bathroom and the kitchen, and fruits. The rooms are elegantly decorated, with pictures and books (there are really a lot of books, if you care to explore a bit there are a few surprises, most books are in Spanish, but many picture and design books are nonetheless quite enjoyable). The apartment has two bedrooms, easy to accomodate up to 4 people (we had two). It has very fast Wifi, AppleTV, Netflix, and LOTS of DVDs if you want to spend sometime indoor. It has a nice small balcony with plants overlooking the quiet street.

Marco prepared us a bunch of printed maps with lots of his own markings for the recommendations for restaurants, stores, and places of interests and transportations. Marco even gave us a Metro card to use on buses and subways, although we didn't get a chance to utilize. We kept close contact with Marco on WhatsApp and he's always fast to respond and helpful.

The apartment building has a locked entrance and it's pretty secure. The neighborhood is really safe and we don't feel uncomfortable walking around at 11pm looking for food. There is an OXXO convenient store (7-Eleven like) half a block away, with a burrito stand next to it, and two blocks away there is a taco place called Taqueria Los Parados which we found delicious. It's not far to walk to Roma Norte and the center of La Condesa, where a lot of coffee/restaurant/bar/stores exist; it's also close to the major throughfare Av. Insurgentes where you can take buses.

On a side note, we used Uber most of the time, which I also highly recommend in the Mexico City, it's cleaner, friendlier, and cheaper than taxis, and you almost always get a bottle of water.

We enjoyed our stay very much and I definitely would recommend this place to anybody who's visiting Mexico City.