The most useful thing about this program (that I've found) has been being able use it with multiple clients at once! We have several different properties throughout California so we needed something like Concierger which allowed us all access together as one system without having separate accounts set up each time you want more than 1 client using your account etc.. This really helps streamline our processes!! It's not perfect but its getting there - they are constantly updating their product & making changes along those lines regularly :) There isn't much of anything i dislike currently other then when new updates come out things may take some extra work before becoming available again if used frequently enough by many people across various locations.