Here are a couple of videos featuring the Clairefontaine MyEssential notebooks! These notebooks have 90 gsm paper, numbered pages, and index pages so they are great for bullet journaling.
Journaljoy did an excellent video showing all the features of the MyEssential notebook, with pen tests and writing examples. You can see her video here.
On our ExaclairUSA YouTube channel we have a video showing all the details of the MyEssential notebooks, all the cover colors, and more information on the paper. You can see that video here.
You can see lots of reviews of the MyEssential notebooks and examples of how people are using theirs here.