By folding backwards as it does, that big screen is essentially split in half, giving you a 6.6-inch display in its regular, "closed" phone format, outsizing all but the biggest phablet giants. (You get full use of the screen only when you unfold the phone.)
Having a big outer screen in "phone mode" makes it much more usable than the closed Galaxy Fold. In my several months with the Fold, I've found its 4.6-inch outer screen to be so narrow that typing on it can be extremely difficult. As a result, I almost always use it in its large, folded-out tablet mode.
The OLED display itself is bright, vibrant, pin-sharp and even under the bright lights of my hotel room -- and later, under the admittedly gray sky of Paris -- I didn't struggle to read what was on screen.
Watching videos in phone mode is great, but it's when you fold it out into its full 8 inches that those videos become significantly more immersive. I really loved checking out the images I shot on my day out in the city on that big display.
To allow it to bend, the display is covered in plastic, not glass (as are all of today's foldable phones) and, like we've seen on the Galaxy Fold, there are some noticeable ripples on the screen's surface when it lays flat.
But they're best described as "ripples" rather than the more pronounced "crease" on the Fold. This is likely due to the fact that the screen doesn't bend at such a sharp angle, thereby causing less of a crease in the display material.
In addition, the folding hinge is a bit stiff. Bending it backwards from its tablet mode feels like you're having to force it more than it really wants, and on my first few attempts I wasn't sure if I was doing it properly.
Having used the cameras extensively throughout my time with the smartphone, I'm pretty pleased with the results, particularly the portrait mode, which gave an extremely accurate bokeh around my willing subject.
Other specs are pretty much in line with what you'd expect from any top-end smartphone. It runs Huawei's latest Kirin 980 octacore processor, has a 4,500-mAh battery with all-day battery life, 512GB of internal storage and 8GB of RAM.
Having spent all day with the Mate X, I'm confident in saying that this is my favourite foldable phone I've used so far. My time with it has left me extremely excited about what we'll see from folding devices in the years to come.