There are quite a few solid options out there for pdf-based planners. The main reasons you might choose this one:
Significant customizability and modularity. Create a planner with the features that matter to you, without extra stuff that gets in your way
Consistent and intuitive navigation
Support for national holidays in hundreds of countries
Excellent support for bullet journalling
Aesthetics – this is subjective, so take our demo files for a spin on your device