I watched the chapters that were relevant to me and I have opinions on it:
- The advanced notebook is probably the best note taking app I have ever seen
- I'd appreciate if they enable custom templates for the notebooks
- Annotations for books are stored on the device and not the cloud, can break easily with sideloaded books
- I find their solution for changing font size and keeping annotations intact perfect
- Almost 100ms lag is too much (hopefully fixed in a future update)
- Dropbox options are great
- PDF rendering / interpretations of strokes is bad in comparison to boox
Unfortunately, the lack of an option to upload owned epubs to their cloud is still an inconvenience if you want to switch from a different vendor. Yes you can sideload everything from dropbox but not all their devices support dropbox.