I love that it's easy to use, has multiple options for setting up alerts (email or text), is very customizable in terms of what you want alerted when an alert occurs, can be used from any device with internet access etc., offers many different types/sizes of insurance companies so there are lots more choices than other apps out their as far as which ones work best! Not much - just like all software products these days this one seems pretty solid but nothing really stands-out either way. We've been using Sentinel Alert since we started our business almost 4 years ago now & haven't had anything negative say about its functionality yet!! It was relatively inexpensive at first compared to some others available then later became quite expensive per month if not paid annually vs monthly billing option offered by competitors who have better features such as having additional.