This program has been very useful in our organization because it provides us with quick access of all metrics that are important from different networks which we can easily monitor them using this software without any hassle thanks beyouse! Nothing really dislike about cactus but I think there should have more options when you want too see graphs or charts other than pie chart only like linechart etc...
But overall its good product so far if your looking into some management solution then i would recommend u give try once!! We manage networking infrastructure where each device connected through switchs gives information regarding traffic rates over time alongwith uptime percentage by day/week/month.