Stayed with Olaf for four nights while I attended the nearby LEC. First time in Germany and first time using Airbnb.
The house seems to be a three floor house right next to the canal, where the top floor has two rentable rooms and communal kitchen/bathroom with shower. Washer/drier is available in the bathroom at €1 /hour.
The room we rented was lovely, it worked perfectly as a base of operations for two 18-24 tourist brothers. Clean on arrival, good WiFi and more than enough space for two. Adlershof station was around 20 mins walk away, from which you could get straight into central Berlin.
My one critique is that the shower was difficult to get in and out of- It would benefit from a shower mat.
Overall though, we very much enjoyed our stay with Olaf, especially at £20 per person per night. We will seriously consider staying again if we find ourselves back in Berlin!