Nice place a bit away from Stockholm center. Far enough away that the food is significantly cheaper, but still an easy trip on the T-Bana. If you felt like walking, its about 25 minutes from Centrum, 35 from Gamla Stan. About 20 minutes to Gamla Stan all in if you take the T-bana.
As for the room, nice, clean, with all the amenities you will need. Check-in and checkout are super easy, with all the information sent directly to you.
Kungsholmen itself is a really cool place. Within 10 minutes of the hotel you can walk to the coast, and have excellent views and a pleasant evening.
We can fully recommend this place for a nice exploration of Stockholm!