Erasable Notebooks Review

Reviewing 6 different erasable notebooks.
Ink on paper types:
* Rocketbook Everlast: getrocketbook.co.uk/
* Elfinbook: www.elfinbook.com/en
* NewYes Notebook: newyes.com/
Marker on whiteboard types:
* Infinitebook (or Ecobook): en.infinitebook.com/
* WhyNote Book: whynote.co/
* Esquoia Notebook: www.esquoia.com/
Other stuff...
* FriXion pens: www.pilotpen.co.uk/en/collect...
* Staedtler Lumocolor correctable pens: www.staedtler.co.uk/en/produc...
* Stone paper: en.wikipedia.org/wiki/Stone_p...
Update:
I only discovered this after I made the video. The shadows that are left on the Rocketbook can be removed after all when using a so-called "magic sponge" [en.wikipedia.org/wiki/Melamin...].
The marker on the whiteboard notebooks is also a bit easier to remove with the same. Although I discovered that the easiest to remove from those is by using any other colour than black. Only black is difficult to remove, all other colours remove as if they are just a minute old, even when they are 5 weeks old.
You can find detailed photos of the two experiments I did with all the notebooks on my blog: blog.selfthinker.org/2018/08/2...