We had a lovely few days in Berlin at Tia's apartment. The place feels very spacious and decor is very chic. Our two-year old loved all the sofas and bean bags etc.
The bedrooms are very spacious and beds very big and comfortable. There are also shutters so you have total darkness at night.
The location is beautiful, directly opposite the canal and pretty tree-lined path. Lots of tasty restaurants, bakeries etc nearby. A lovely playground round the corner for little ones too.
Thoroughly recommend!