A compact and well laid out modern apartment. It had everything we needed for us and the kids on our holiday. Appliances functioned perfectly with no issues. Location was perfect as well -- easy walking distance to food, supermarkets and the train.
The only minor downsides -- very soft beds without much support, slow wifi that struggled to keep up with a family of four, and a cumbersome registration process (which seems unavoidable given government regulation, but it does require you to give up a lot of personal information).