Multicast Network Monitoring

Curious if anyone has any experience with tools specifically for monitoring multicast. Finds where the trees are, paths they are on, tracks all senders/receivers per group, handles PIM-SM, RPs, MSDP, MDT Tunnels over MPLS VPN, etc. Such as Cisco Multicast Manager, EMC Ionix Multicast Manager, CA Spectrum? The good and the bad? Worth the effort/investment? Thanks