Great place to stay!
The flat is very tidy, modern and has all you would need. Just like in the pictures. The host, Kathi, was very helpful.
The locations is ideal for tourists. Very close to public transport and city bikes. We stayed here with 4 people and it was no problem at all. The sofa-bed works just fine.
I can strongly recommend Kathi's place and we will definitely ask Kathi to stay here again when we visit London.