I didn't meet Nico in person, but he was always available via app, so I got all the information needed quite fast. I got the keys from his neighbor.
The location is just great, you get plenty of great restaurants nearby, also some clubs are reachable by foot in 5min. There are couple of supermarkets around, bio-shop, well, everything you need to have a great experience in Berlin. Public transportation is 400m away - you can get to the center of the city in 20min by public transport.
The apartment is facing internal yard, so it's really really quiet in it. You won't hear any noise during the night. It has all the things you might need during your stay. Only two issues I faced - were that wi-fi wasn't working during my stay, so I had to use the cable, which wasn't very convenient. And the bed wasn't very comfortable to sleep for two as one side is a bit declined and you get the back pain in the morning. Apart from that, everything else was great. Pity though that it was a bit too cold outside to use the balcony to chill outside, as it's perfect for that.
I'd definitely stay here again!