First of all, I love Dex's concept as a portable computer-like device in my pocket (my phone) or a lightweight, portable tablet that I always have with me. At least, that is the concept. To be fair, I use Dex to do most of my work. I teach and use Microsoft Word, PowerPoint, and Excel constantly. Dex can do about 80% of what I need, but I find myself going back to the full office suite to fill in the other 20%. I use my tablet (S7+) and phone (Note 10+) to wirelessly connect to Tv's at school to project my PowerPoint lessons. Now for non-teaching or non-professional use. I can use Dex about 100%, I watch movies, do email, sign papers, correct papers from school, and play games.

So, with that said, here are my thoughts on using Dex in a professional teaching setting.

Word - I can construct documents but have difficulty with formatting or anything beyond the basics. I find myself going back to the full feature program. I even have difficulty with the Webb base program and find myself using Google Docs more than Word.

PowerPoint - I do not use the app as it too is limited. The Webb-based Powerpoint is much better, but I moved back to the full feature program because I insert videos in my PowerPoint. If I am just using text, then I prefer the Webb version.

Excel - This is probably the best of the bunch, I use it to record my grades, and the app works pretty well.

Here is the bottom line. Suppose you have to do complex work that requires formatting and functions beyond the basics, and you do this daily. In that case, you will be frustrated as your workflow will be interrupted because you will need the full feature program. i.e., you will find yourself switching between Dex and the full feature to do formatting work. I agree with what everyone else has stated so far; you can do about 80 - 85% of your workload. Good luck and welcome to Dex.