I like best how it can be used to monitor both physical servers as well virtualized ones, allowing you also keep track over their health status by using this tool! It's not very user friendly when compared against other products in its category but we're working hard at improving upon these aspects (even though they are good already).
We've been able solve our technical problems regarding server monitoring within minutes instead having taken days or weeks before doing so without any tools such us intellimagic vision!.