I like that it can be accessed from anywhere, anytime using my mobile phone or computer with internet connection! The UI is really user friendly which makes me feel more comfortable to use this app for managing our business especially when we are away at work/traveling etc..
There could sometimes have some minor glitches but they will get fixed as soon there would come an update of new features so no complaints here yet!! Nothing much since everything works great without any issues now even though i am not able manage all aspects by myself (elevator operation) anymore due lack time & resources available only during office hours :). But still its good enough because other people who also help out do most part while im busy elsewhere doing something else important than working online :).