Ok, so my review is a bit overdue but I was just so keen to write sth for K&L.
Although I didn't get the chance to meet them in person, I could tell from their messages that they are super friendly and nice. From days before your travel, they send you all these must-know tips and map of things to do. very quick with responding.
Their flat is super clean, stylish in a minimalistic way. Not particularly close to the city centre but reasonably accessible by the underground.
really enjoyed my stay. much recommended