The value proposition of this product is claiming to do too much. Because I don't have a pre-existing belief in the value of integrating all these functions in a single "PIM" (what is a PIM anyway? is my smartphone a PIM?) I'm stuck wondering how this might help me, and reluctant to try something that might not be valuable until it has replaced a huge set of habits/tools.

If I want to benefit from trying this PIM, where should I start? In case it helps, I'm a gmail/gcalendar/emacs org-mode user.