I absolutely love the Helsinki backpack! I NEVER write reviews, but it is mind-boggling to me that this bag isn't receiving more feedback. So much so that I felt compelled to take time out of my busy day to show some love for all the colors (since they are rated separately on the website).
To be clear, I purchased the "all black" bag, and you can find a more in-depth review about the quality and why I love it on that bag's page. However, all the colors are stunning, and if the quality is consistent across all the Helsinki bags, you really can't go wrong with any of them.
Take the word of a traveler that loves functional backpacks with a sleek / minimalist design. You should buy this bag!