We had a great time at Ju's apartment! Ju herself wasn't there, but her flatmates welcomed us and were there to help us if needed. The dog was also very friendly and cuddly after the arrival hassle. :)
The apartment was lovely and Ju's room was full of light with a big balcony full of flowers! We mainly used her room and the bathroom, which was also nice and bright.
Location was actually better than we expected: with the M4 tram we got straight to Alexanderplatz in about 15min, that was super. The apartment is near the beautiful Weißensee, the park around it was a perfect place to have a breakfast picnic. :)