I highly recommend staying here! It's magical to be in Stockholm's old city, and at the same time Residence Perseus is within walking distance to the central part of the city and to the hip Sodermalm neighborhood.
The Bliss apartment I stayed in was stylish, sparkling clean, and very comfortable.
If you happen to have a car, I recommend parking it in the Gallerian lot, abouta 15 minute walk from the apartments.
Highly recommended!