The flat is very nice en clean and has everything you need for a comfortable stay. The kitchen is well equiped and the bathroom is extra clean.
The location is superb. Gamla Stan is beautiful and is right in the middle of the touristic part of the city.
Although we didn't meet Katia in person, she is an excellent host and answers all your questions.
We had an excellent stay and we'll definitely consider this flat for a next visit to beautiful Stockholm!