All in all great. We were two and we enjoyed the space. I’m not sure if it could feel crowded with 4 people though,
One small thing, despite being on the 16th floor, it’s very easy to hear the cars and traffic from downstairs. I would recommend air plugs.
If you visit in the cooler months. You can request blankets which will be delivered to you. There is also one radiator. Which you can move between the rooms to warm them up a bit.
Otherwise everything was great, we enjoyed our stay