I love the smaller sized planner. It's easy to store in a convenient place so it's always within reach. I like having a whole month at a glance as well as a week at a glance. When I worked full time, I needed a daily calendar, but now that I'm semi-retired, the weekly one works best for me. I keep a calendar on my phone as well, but I'm enough of a Luddite to want a written-down schedule as well.