The flat is very clean, freshly renovated and furnished. It has comfortable beds and lots of brand new amenities including an interesting balcony with the bay view - a good place for a breakfast. The area where the building is located is very interesting if you like the modern architecture. There are lots of modern buildings neighboring water, huge rocks and trees in the vicinity. You can use an elevator to go to the walkway (leading to the nearby train station) to enjoy the views of the complex from above.
The location is not central, but it takes around 30 minutes to go to any place in the historic center of Stockholm by train (10 mins walk) or subway (4 minutes walk if you take a bus and then change to the subway) door-to-door.
It was a little bit puzzling to get 10 pages long manual for the building before arrival, but it turned out to be very informative and helpful. What surprised us was the requirement to remove the linen before checking out (cleaning fee is >500 SEK), but the company managing the flat wrote us that we don't necessarily need to do it once asked about the reasons. Please be prepared for some screening before being accepted but I can understand it since the flat is brand new.
What to improve: shower curtain would be very helpful, it's hard to take a shower without it. Also, it's a little bit hard to find the key to the apartment if you arrive in the night.