The most useful is for scheduling an appointment with customers who have been reached by cold calling, emails or text messages as well being able schedule appointments without needing any additional software like calendar apps are also very helpful! Having all of this information at my fingertips makes it so easy when I need them immediately (e-mailing leads) versus later because they want more details about their account once we meet face2face!! It's not perfect but i do appreciate that you can sync up several different customer tracking tools into one place which helps immensely if there aren't many systems out already available such has ours was previously done separately via excel sheets etc..
Not much yet other than just knowing how great these guys were helping us set things right after our office manager left unexpectedly during transition season last year :) They did what no others could - helped me fill his shoes while he.