At first, just because we arrived soon after the departure of previous guests, I can't say I was positively impressed by the flat, since this was actually dirty and messy. However, after a couple of hours, once cleaned, things turned overnightly different. Flat turned comfortable and, incredibly, immersed in silence. The area where the apartment is locared is quiet and green, with no traffic altogether. It's easy to get anywhere (with public transportation close by) with bars and cafeterias just around the corner.
Absolutely a good choice and I want to thank my host to suggest it even if I was thinking differently at first. Just a little drawback...the Berlin city sojourn tax that we were obliged to pay apart. It's none of our host business but a nuisance anyhow.