The 79 block along Karl Marx Avenue was easy to find but the 79 lift is not so easy to find once you're in the building. But after buzzing again, Marysia was very helpful and met me out the front of the building and showed me the way up.
The room is nice and big. It looks exactly like it does in the picture.
I found my first night's sleep a bit uncomfortable coz the sheet on the bed was a bit rough. But Rene happily gave me a nice soft cotton sheet the next day. He was very helpful. They're both very friendly. And Rene printed out a couple of maps and marked some places of interest.
The kitchen was a bit of a mess but who stays in to cook when they're staying in Berlin?!?! And the bed is a bit hard but fine for a few nights.
The cafe downstairs was good. The staff were so lovely, worth a breakfast visit. (Open early everyday except Monday when it opens at 1pm.)
The apartment is only a 25/30 minute walk to Alexanderplatz. And about the same to Kreuzberg. And the Kino International cinema, ten minutes walk away, is a must!!
Quite amazing staying in one of the "workers palaces" from the early 60s. A bit noisy on the main road but all in all, well worth it.