I just completed a 4 night stay, booked a queen room and upgraded to a larger king room. Breakfast is only in the breakfast restaurant with a separate seating area for Diamonds. Evening reception in executive lounge is 17:30 to 19:30, help yourself food & drinks - one soup, section of sandwiches, cheese, various other items, one night had dolmades. Carlsberg, one red, one white and one sparkling wine.
Great location - less than 5 minute walk to Slussen metro station, 10-15 minutes walk to the Royal Palace, less than 10 minute walk to commuter ferry (#82) to get to ABBA museum and Vasa museum and other sights in that area.
I would definitely stay here again