The apartment is great for longer stay, especially if you are tired of hotels.
The location is amazing, very close to metro and easy to get to and from the airport.
The apartment is safe, there are cameras in the entrance area and it is also very quiet - nonetheless keep in mind our visit was during pandemic, when restaurants had to close at 8PM, there are two restaurants in the building and it may be different during summer or during normal times. You may get to all the sightseeing spots also very easily. Shop is in the vicinity. We would gladly stay there again when next time in Sweden.
The only downside is the washing machine - we didn't need it, however it looks like the cable connecting the washing machine to the water supply was not connected, if you need to do your laundry I recommend verifying with Maria before you make the booking if the washing machine works, other than this the stay at Maria's clean and cosy apartment was amazing.