I bought this for my daughter at university. She has dyslexia and, as such, can find organization of her work difficult. The planner not only gives her a visual reminder of what is coming up (she colour codes it for her different lectures so she can see at a glance what she has which supports reading the words) but she can also plan shopping trips and other extra activities that happen at university. The very clear structure of the planner makes it easier for her to use and the gentle use of colour helps to highlight the important areas rather than causing a visual overload.
The weekly planner works best for her as the week at a glance (rather than the Daily Planner) gives her the overview she needs.