I had a great time at Apostolos' apartment. It actually surprised how well decorated it is. It is spacious and well maintained. Even more than the pictures show.
I think it is a perfect apartment for one person or a couple, for a short or long stay. The apartment has everything you need, bathroom utensils, drawer, hangers, a table to work etc. The kitchen is also super complete. You can find all the appliances you need to cook. If you don't want to cook, that is also fine, since the neighbourhood is the best for foodie lovers. There are plenty of restaurants, bar, späts and also different stores. I've been to Berlin many times but I didn't know Friedrichshain that well and now I am in love with it. It is a very lively area and close distance to many other nice places. The metro station is just 2 blocks away from the apartment.
The shower might be a bit small for a big person, but the shower pressure is amazing. I could live under that shower! ahaha!
Apostolos is a nice sweet guy. You can count on him to help you! I definitely recommend the apartment.
I am for sure staying there again when I am back to Berlin!