Smartphone manufacturers are obsessed with thinness. Being the 'best at' this or 'most' that gives you bragging rights and that's what Chinese OEM Oppo appears to be after with the R5. At just 4.85mm thick, it's a pretty impressive form factor, though you'll have to compromise with a smaller battery, a pretty standard 1080p display, average camera and a mid-range SoC. Can the R5 still deliver a better experience over a thicker device with, potentially, better hardware?