This is the Superbowell A6 in dot grid: https://www.amazon.com/SuperBowell-Hardcover-Notebook-Bookmark-Expandable/dp/B08QN37YB9

I was on a tight budget and couldn't justify spending $14 on a Leuchtturm in the same size when I started this one, so went with a cheaper alternative. It's one of those Amazon mystery brands, but has pretty good quality paper and solid construction for the price (you can get a two pack of these for under $10). And they come in a decent selection of colors as well - mine is dark green. Downside for some folks is that the pages aren't numbered, but I don't use an index or number my pages anyway, so it's fine for me. Hell, I actually ripped the premade index pages out of it when I first got it lol