I stayed at the Rica Hotel Stockholm in early January 2012 while on a business trip. I stayed for one night only.
The location of the hotel is terrific. It's about two blocks away from where the Arlanda Express train terminates (the hotel even has a TV screen with the departure times for the train) and it's right near Hötorget and there are many restaurants and shops in the vicinity.
The staff were very friendly and helpful and check-in was a breeze, as was being seated for breakfast in the morning.
The room itself was small, but very neat and clean. The amenities were not overwhelming, but adequate. There was an ironing room on the 7th floor, where you had to go to get your shirt ironed ahead of next morning's meeting. Not ideal, but workable, and it wouldn't really be a huge problem if you're on holiday.
The breakfast buffet was very good. Lots to choose from and the food was of good quality. There was ample table space, so the breakfast room (the hotel's Winter Garden) wasn't too crowded.
To summarise:
Liked: Location, breakfast, staff.
Disliked: Small rooms.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC