I am using my Supernote so much more than I thought I would! I even sideloaded 3 other apps into the device and they work as well as you could expect. (I sideloaded Ankidroid so I could do my long anki session without having to stare at a bright screen for too long and the app works very well on the deivce. It is a bit slow because the device isn't made for it but studying the cards work well and syncing doesn't take too long.)
The sideloading is not as hard as I expected it to be and as long as you have a safe source, there isn't too much risk in doing it. (I have had no problems so far.)
I also really like that I can make my own templates from the device itself (I made a bunch of templates from just making a note with the contents of the template and then just export the pages as an image into the MyStyle section.)
The writing experience is great and being able to add headings to my own notes is great to quickly find what I want when I am looking for some notes I took a while ago.