Helena's flat is beautiful and spacious, and is perfectly located in the heart of Gamla Stan.
This flat is NOT for people who have problems with stairs. There are four flights of spiraling steps to get to the living area, 65 stairs total, and if you're out of shape it might wear you out. (There's another 16 stairs up to two of the bedrooms.)
The roof deck is amazing, looking west over Riddarholmen. The common spaces are large and well appointed. We had plenty of room for playing cards or hanging out.
The upstairs bedrooms are not huge, but very few bedrooms in Stockholm are. The photos give a fair representation. This is a great place for a family or group of adults who want to be in the middle of everything.