Personally, I'm loving the versatility of this device. I use it primarily for reading and writing. I've activated the Google Play Store so I could download other apps, but there are plenty of basic apps available on the device's store such as Kindle, Kobo, and Libby. I've downloaded Marvel Comics Unlimited which reads beautifully on this device. It automatically refreshes after each page turn, so ghosting isn't an issue with the color pages or panels.
The device has Bluetooth for headphones, but I also use it to connect keyboards for writing. And it had built in speakers and a microphone.
For writing apps, I usually use One Note which syncs with my computers. I can "share" my One Note chapters with One Drive from the device (as a text file), and then download the text file to use with the Boox reader.
The built-in Boox reader is amazing. I've used it for text files, PDFs, and epub with no issue. I love that I can handwrite all over the page. I can also do the more standard finger touch to highlight and make notes, but I like being able to make notes and shapes on the page of my books.
The note taking app is wonderful too. Writing on the device is very natural and customizable. While notebooks can be accessed using the Boox website, I prefer to share my notebooks as PDFs and upload to a folder on One Drive. I can read over notes from my computer that way. But individual pages can also be exported as IMG.
Why this device over a normal tablet or ipad? I really like the screen. I love e-ink screen and was excited to try color e-ink. I hardly use the backlight, especially during the day, so even with heavy use the battery lasts for days. The lowest I've let it get was about 40% after four days or so of heavy use. If I am reading comics in the evening then the backlight is needed as the color e-ink is kinda dark. But again, during the day, reading comics without a backlight in the bright sunlight is wonderful!
Pros: Pretty much anything a normal Android tablet can do, this thing can do, including split screen. The battery lasts longer than a regular tablet. It's very much like a proper notebook. Every third party app can be "optimized" for the device. Being able to write and markup books has been fun, especially when I'm looking at my own work and editing.
Con: The e-ink screen is dark in anything other than direct light. So the back light is generally required to read color anything indoors. And the color, even when it is black and white, will be more like the old e-ink/newsprint in tint. It's a dark grey color which is different from the many current devices that have the bright white backgrounds. The screen will also have ghosted images which is especially more prevalent in any mode other than normal (the slowest speed), but apps can be optimized including their refresh rates, there's a gesture for refreshing the screen, and the navigation ball allows for certain buttons to be pinned and moved around the screen- such as the refresh button.