The best part that I like about ChannelMix is simply having unsampled data from GA. That alone provides value that can not be touched! Review collected by and hosted on G2.com.
I've just been having some troubles with the visualization tool that I use (GDS), and it doesn't reflect the ChannelMix software, I think it's primarily the visualization tool that you use so choose your BI tool wisely Review collected by and hosted on G2.com.