Jarl is an excellent and caring host. He replied promptly to my request and sent invitation e-mail with all necessary information and description to find the flat in Stockholm.
I met Jarl the next day and apart from preparing breakfast with the rich contents of his fridge, I was allowed to use one of hi bike cards to rent one of Stockholm's bikes for free.
Room, kitchen, bathroom and flat are in perfect shape and pleasantly located north of Östermalm district and very close to Djurgården island.
Highly recommended! A great value-for-money!