This apartment is fine. Nice, high ceilings, open floor plan and a newly renovated bathroom with a great shower. It is an adapted commercial space however, and it's on the ground floor on a street. The neighbourhood is fine, although the 'hipper' part of Friedrichshain is located at a 10 minutes walking distance Southwards.
The night shop on the corner is convenient and there is an S-Bahn stop within walking distance. Parking in the street is free. Check in is done by youarewelcome and that went smoothly.
Some things I didn't like: upon making the reservation, we received an elaborate message with all the house rules and regulations (some of which didn't apply to our apartment. E.g. there was no hallway in which to lock up bikes and no courtyard where we weren't allowed to smoke). I think Alan and Kaisa send this because people may have misused the place in the past, but it came across as patronising. We are two sensible adults and don't like to be spoken to as if we are children...

Then there is the noise thing. They ask you to be quiet after 22.00 for the neighbour's children, which is fine in principle, however, the neighbours were quite noisy past 22.00 as well. They warn beforehand that there is 'potential for noise', which we complied to, but prepare to be woken up at 5AM by slamming car doors of the cleaning company that is located next to the apartment. There is no potential for noise. There's gonna be noise.
Other than this, the apartment is exactly as advertised, the pictures is what you get.