Little Coffee Fox uses Rhodiarama softcover dot grid notebooks for bullet journaling. She has done several excellent posts showing tricks and tips on how she uses them. In her post My 7 Favorite Bullet Journal Spreads of 2017 she shows a compilation of her bullet journal pages she found most helpful and inspiring including her List Of 100 and her Affirmation Log.
One of her previous posts she links shows 5 Bullet Journal Weekly Spreads (where she also reviews the softcover Rhodiarama notebooks).
Another previous post she links is a collection of bullet journal hacks she found particularly useful.
The Rhodiarama softcover notebooks come in 16 different colors, in A5 or A6 (pocket) size, with lined or dotted pages using 90 gsm fountain pen friendly paper.