Great location, mere seconds from the einbahn and with good amenities around it including a 24H Turkish bakery across the street. Check in and out was very easy with a key safe system at the door. There are stairs and no disabled access, so if you have mobility issues, this wouldn't be for you. The apartment was spacious and comfortable, you have a kitchenette with microwave, hob, fridge and sink, which was handy.
There were only a few things which kept it from a 5 star review - the drains (I assume) in the bathroom smelled absolutely awful and keeping the window open in Dec was not an option. We were also only given 2 rolls of toilet paper for our week stay so we had to buy our own (not a big deal, just not expected). Because of the proximity to the einbahn, you can hear trains and announcements, but they have provided earplugs.