Dex Max is actually pretty good. However, I sometimes get hangs and freezes while using it. Hopefully they add some more features to Dex as well as compatible apps. I currently use it as my desktop for light usage (Browsing, Music, Movies)
At home I use the same way, light usage, I also tried it at the office for 2 days instead of bringing my work laptop, I connected to my work laptop that I left home using Remote Desktop and it worked flawlessly, no more bringing the laptop, charger, docking station and cable lock when I need to go work in the office.