I have been ordering these calendars for close to 5 years now and before that, the hard-bound version of the same 'Teamwork' calendar. I switched because the spiral-bound stays open on a car seat for quick reviews. I don't want to hold phone up to my face while driving but a quick glance at the calendar keeps me on track. My clients loved the change so I stuck with it. I don't see any reason to change as long as the quality of the product doesn't change. John M.