Worth noting - and the description from the host is accurate - that there is no WiFi here.
There's two bedrooms, but from one you need to pass through the other for the kitchen and bathroom.
All that said, it was a great price, and Felix fitted around our travel arrangements at our convenience.
It was great for me to be on the ground floor, and the street is generally quiet, so any noise concerns there shouldn't be a worry.
There's a friendly locals bar nearby, a good cafe, and some excellent brunch places in about 15 minutes walk.
One thing to note especially is how close it is Tegel airport. 10 minutes in a taxi, and maybe just 15 minutes on the TXL airport bus. And yet, with the transport at hand, never far from most Berlin attractions.
Summary: Basic, but a great price and good transport.