I'm in love with Arket and it's become my go-to staple since living in Copenhagen. Their ethos of selling higher quality clothes that are designed to last instead of being discarded after a season really appeals to me. They have a fantastic selection of really high everyday clothes. Their t-shirts fit well for me and are particularly high quality lasting way longer than the typical high street alternative. Their style is also bang-on for Scandinavia with many muted colors and styles that push the boundaries a little, but never over-step the line.
I'm lucky enough to live reasonably close to an Arket flagship store in Copenhagen and I'd love to be able to exchange or return items I've bought online directly instore like it's possible to do with other brands.