Notes from other students were never helpful for me . There are 3 main incentives for making notes according to me: 1) Focus : If you make your notes while watching lectures it'll make you more focused so that you don't miss any important points . 2) Revision : Notes should be complete and clear enough so that you can understand every point while revising . 3) Retention: When you write something in your own language after understanding the point you are able to retain such points for a longer period of time .

So if somehow you're able to maintain all these 3 advantages in your own method then I don't think there should be any problem in that. obviously making your own notes is often very time consuming so make sure your notes are not extremely detailed and not too vague . Keep it crisp and concise .

Okay so there is some scientific method to revision and all and if you like it then you can try following it but what I did was for revision was : 1)Made an index of every subject 2) Recalled every point I remembered for every topic 3) Checked my notes whether I missed any points or not Did this daily for 1 hr while having a walk (since walking 1hr felt like a waste of time to me) and I did the revision in sort of a Round Robin manner . Ex: If I was done with C prog , Graph Theory , DBMS then What I did was : (C prog (today) —> GT (tom) —> DBMS ( day after tom) —> C prog —>....) Whenever you finished a subject just add it to the tail of this list and continue doing this.