I didn't get a chance to meet Matze in person (he was traveling) but his friend Sven, who was waiting for us, was very friendly and helpful providing an extra bed and giving some tips about the area and the city in general. The neighborhood is quiete and the apartment close to the metro station that in three stops takes you to the one of the city's youngest and busiest street, full of bars, restaurants etc.
Matze's apartment is cozy and comfortable, there is a cute balcony to chill at night drinking some club mate or a beer.
Unfortunately the wifi connection was not working at the time we were there, but you can always find wifi across the city.
Thank you Matze & Sven