I havent used it, but it does seem like good stuff. The description seems like it is a late flower specific microbial pack with microbes centering in on phosphorus and potassium transfer into the plants, just like a good late flower AACT would do. Sort of expensive though... but I bet it gets the job done! I would only add it at the end while brewing a tea... you don't want that strong population to kill off microbes you might be trying to brew.
You might want to do a cost comparison with some of the other microbial superpack products. URB, Voodoo Juice, Recharge... all very similar, and then the end of flower products like Terpinator, would be even more effective since the microbes will be in there to process the stuff.