The Yoga Book does not have a well-defined lip so opening the device with a single hand can be a bit challenging. I usually have to use two hands to pry the device open. I am unsure if Lenovo designed it this way to help better protect the device from accidentally opening or if it was a purely aesthetic design choice.
The geared hinges are well designed. Lenovo's solution is many times less bulky and awkward than what Microsoft uses on the Surface Book. Lenovo's hinges allow the screen to sit flush with the CreatePad while maintaining enough resistance to open the screen at any angle. The micro gears actually turn when you open the device, and they feel very durable.
The digital keyboard has a touchpad, but there is no right/left click (there is on the Windows 10 version). I measured the keyboard, and it isn't that much smaller (maybe a few millimeters) than a full sized mechanical gaming keyboard. The keys will illuminate when the Yoga Book detects it's in keyboard mode, and you can control the level of illumination and timeout. Pressing a key will cause a slight vibration, so you know you have pressed a key, and a little click chime will sound. You can turn both those features off.
The keyboard also learns from your usage and mistakes, so as you use it, you will make fewer mistakes. I have big hands, and it caused me to make a few mistakes. I won't lie, typing on a digital keyboard doesn't feel natural, but over time I got used to it.
The CreatePad can switch into create mode by pressing the pen symbol on the touchscreen or long pressing the pen symbol on the CreatePad. Once in the pen mode, you can draw on any piece of paper with the RealPen. It is very accurate and has excellent palm rejection.
Lenovo has an included application for drawing and taking notes called NoteSaver, and it will save everything. You cannot write on just any part of the screen; you must stay within the program. The included paper pad magnetically sticks to the CreatePad, so the paper doesn't move around as you draw on it.
The front 2MP fixed-focus camera has decent image quality, enough for web applications.
The rear 8MP auto-focus camera has much better image quality; it's more on par with cell phone quality.
The Yoga Book can work just like a typical notebook with a screen and keyboard, but you can also make a tent or slanted "L" in case you want to lean back and enjoy Netflix.
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