The interior is nice to look at and nice to touch, especially by Mazda standards, though for the record I am a fan of their lineup - wide Spartan design ethos.
It's a little jarring to exit Samsung's beautifully designed new TouchWiz interface and come into the spartan OnePlus environment — the OnePlus 5 almost feels like it's on fast - forward — but I appreciate the smaller company's minimalist ethos.