using other's notes is fine...but ultimately, you won't acheive your potential...they are other people's understanding of the syllabus... not urs... therefore, soemthin that may seem clear to others may nto seem clear to you...
therefore, makin ur own notes is for your own good... i try not to dis any one, but think what are you puttin on the line here?? ur hsc, or other people's hsc??