CommonCurriculum is AMAZING!!! I recommend you to all my colleagues who ask about plan books as well as homeschool parents looking for a way to organize their lessons.
I teach students individually, so I use CC differently than many.
One of the best things I love about CC is that I always have past lessons available to review. Sometimes I don't remember specifics about a lesson, so I have gotten in the habit of adding an extra card for after-lesson notes to help me remember important things that happened during the lesson, unexpected problems, questions that occurred to me during the lesson, or what I want to do next. It's easy to go back and review these before every lesson to remind myself of a student's specific needs even if it's been several weeks since I last saw the student. All of this detail filled binders when I tried to do it on paper.
I also use the lesson plan template to help me plan and cut down on paper. Since every student follows a different curriculum based on their own needs, it really doesn't help me to use the long term planner. Instead, I create a different template for each student. Within the template, I add the current goals and general steps to meet them. Every week I go back and cross out completed steps. Because it's on the template, it shows up for every class. Makes planning a breeze! I have a list of concepts to review (the crossed-off items) and a prepared list to show where we're going next.
I've been using CC for years now and I wouldn't change.