TJ's notes are relatively thorough, the departments really put in effort to modify bits of the notes to add details/updates every year, so if you're struggling with your subjects, you may want to consider either getting help from your tutors or better explanations from notes. Despite being one of the top JCs, there is still an emphasis on explanations for the fundamentals (probably most useful for mathematics relationships/econ concepts), some of my secondary school friends in slightly better schools do refer to our notes when we study out, thus it may be a good complement/reference for your own notes.
All of them come in either files or the prior binding. Do email me at [email protected] for more information. Thank you~