The best thing about this software is that it's so easy to use, I can't think of anything bad at all! It does exactly what you need - keeps track of your site content in real time as well as notifying when there are updates or new versions available for download.
There really isn't much else to say other than how great their customer service has been over our years with them. We have used many different monitoring solutions but none compare to Sitemapmonitor.com. They always go above & beyond to help us whenever we've had any questions related to using their product.