I had a fantastic time at Amina's apartment. The location is perfect: it's situated on a quiet street in a safe and yet hip neighbourhood full of nice restaurants and cafés, and many young families. U-Bahn stops are within very easy walking distance, but there are also many attractions close by, so on some days public transport isn't even necessary. Either way, this is a great part of Berlin to be in and use as a base.
The apartment itself is clean and spacious (although admittedly I was travelling alone on this occasion), with a great balcony that overlooks the tree-lined street. Amina was good at keeping in touch, despite being out of the country, and put me in contact with a neighbour who looked after the picking-up and dropping-off of the keys.
I can thoroughly recommend this property and would love to stay again during my next visit to Berlin.