I looked into the bullet journal method, myself. I'm an avid note-taker with too many notebooks going at the moment. The bullet journal method reads like a dream and I was really interested in it, in theory. And FWIW the journal itself is a really great sturdy product that stands by itself in terms of "desirable journal that provides most of what I want/need from a notebook."
That being said, after reading about it, taking notes on the method, and vowing I was going to implement it...the process doesn't really work in practice for me. Scratch that, I guess it just doesn't. I think the issue I'm having is that I write/note a lot, and I also don't find a physical notebook to be ideal for maintaining calendars/appointments/meetings. My iPhone calendar syncs to both my work and personal calendars, it updates automatically whenever anyone changes an appointment, and in general serves as a much better actual reminder system of events I need to know about/go to prepare for, as opposed to what I can get out of any physical or paper notebook in terms of calendar/time management ability.
I also feel that the Bullet Journal method is largely task oriented, but I use my notebooks to do more creative tasks like brainstorming, for less creative tasks like making lists and checking them twice, for writing down theories and thoughts as much as concrete "tasks," "events," and "notes," which the Bullet Journal centers its method around.
The method says you can use it for any notebooking purpose, including sketchbooks -- I don't really truly believe that. I don't believe someone keeping a sketchbook is going to benefit from the Bullet Journal method! It also says this method can lend well to diary-ing, however in the entire tutorial of the method they talk about diary entries not once...
I am sure the method works really well for a lot of people and I wish I was one of them. I've been chasing the ideal storage/approach/method to keeping more organized journals/notebooks for a long time now. The biggest thing I have learned is to keep any calendar arranging totally separate from the journal.
I also often find an index much fussier and more time-consuming to maintain than any possible benefit I might reap from keeping it. With a physical notebook in which you yourself have written the notes, don't you often have a "feel" for where it is in the journal, or what it's right next to? I typically can find the notes that I'm looking for quickly by thumbing through a notebook, even a full one -- an index might save me time, but it'd take all the time of regular maintenance in order to do so. Added to the time it takes to read the index and figure out if that's really the page you're looking for -- that feels like more work to me. Not less.
Note - but Dala, seeing you later in the thread reference modules and, essentially, it sounds like variations on the Bullet method that others have built and shared on the website -- maybe I should try poking around at those and see if they offer anything I might be able to use to my advantage. Thanks for bring this up!