We really enjoyed our stay at Aleks' apartment. It is a great space with heaps of bedrooms if you have a big group of people. It is very basic though is well equipped. Our favourite part was the beautiful view of the Spree which backs onto the apartment.
The area is nice, albeit quite far from the centre. It is a 10-15 minute walk from nearby metro stations and a further 25 minutes into the centre.
I would definitely stay here again.