Karolin's apartment is cozy and well located, specially if you need to be close to the KTH campus. It is not far from Stockholm center by metro or bus and it is surrounded by nature. I really enjoyed the great views from the small balcony. I found everything I needed in the apartment and the bed was very comfortable. I highly recommend it.
With regard to the host, Karolin is one of the best hosts I've ever had in AirBnB. She was exceptionally good with the communication. Before my arrival, she made sure that I was aware of all the information I needed. She also gave me many pointers for sightseeing in the city and to explore Stockholm's archipelago. The outstanding communication continued during my stay: she was very kind and thoughtful. She really made me feel like home in her place. I would, without a doubt, stay in this apartment next time I visit Stockholm.