Have you tried DeX mode? If so, how are you liking it?
DeX mode seems decent, but to be honest I've mostly been running in Android mode.
I bought the tablet and the Sammy keyboard case. I also connect my Apple trackpad to it via bluetooth. The trackpad works in both DeX and Android modes.
Since buying the tablet, I'd say that about 95% of my usage has been with the keyboard connected and using Android in landscape mode. The connected trackpad lets me fully navigate with the same swipe and tap gestures as if I were touching the screen. I did test a regular mouse as well, and it works on Android mode, but anything that requires a swiping motion is awkward with a mouse, so I won't be using it again.
I can see DeX being highly functional when you need to quickly navigate back and forth through multiple apps. That's not something I necessarily need on a regular basis since this tablet is 100% for personal use, but I can definitely see how it would be a highly desirable function for people using it for business.
My overall (brief) impression of it is that it's smooth and fluid, though it will take a little getting used to because DeX doesn't support most of the swipe gestures we're all accustomed to. There is no swiping down from the top of the screen for notifications nor is there a multi-page homescreen like Android. You'd think that would be a no brainer and non-issue, but even in DeX mode, my brain still thinks "This a tablet, I should be able to swipe around to see the things I want." So there's probably a slight adjustment period for that.
The downside to DeX is that the app drawer is EXTREMELY cluttered. Every single Android app you've installed is in the app drawer. On the Android side, I hide all the apps I don't use (like icon packs or a clock/weather widget) because I hate clutter and I only want to see the apps that I actually use.
Well, every single app is in the app drawer on the DeX side and they can't be hidden (yet - fingers crossed that gets addressed in a future update). There's also plenty of apps that I don't necessarily need or want to use on DeX, such as games or shopping apps or Netflix. To me, DeX is the "work side" and Android is the "play side" so any app that isn't used for productivity has little value to me on DeX. Not to mention that most of these apps haven't been optimized for DeX so they don't even display properly. You can still create folders in the drawer, so I took everything that I don't think I'll ever use and put them in a single folder to eliminate clutter, but I'm borderline OCD with stuff like this and I'd really just like to hide them and not see them at all. Lol.
All in all though it seems like a really good feature to have, especially if you're looking for a way to remain productive on the go without needing to lug a laptop around with you. I could see someone using it on a plane and writing up a business proposal on the DeX side and then taking a 10 min break and going to the Android side to play quick game of Tetris or something before getting back to work.