This isn't a store-specific review, but the Matt & Nat website doesn't offer a review capability.
I ordered the Brave backpack online in the Blossom colour, which seemed from the website to be a pink-toned white with rose-gold hardware. The bag arrived (after 2 days so excellent shipping speeds!), but the colour is completely different to the website image. It's a pale salmon pink, not at all what the website leads you to believe. I'd like to exchange it but I can't trust any of the website photos.
If you're looking to buy from them, definitely try to make it to a store to see the colours in person!