Nestor is very responsive, flexible and chilled. Check-in was perfect, Nestor waited for me in the apartment and I could enter upon arrival. The apartment is right at Checkpoint Charlie but super quiet as it faces a green inyard. Many sights and museums are in walking distance as well as two groceries and several shipping locations. It's not typical Berlin Kietz area, but super central so you can discover the city from there. Would certainly book it again.