I use some humboldt dark energy and its pretty good haven't used that particular product but...

I have been using advanced nutrients piranha beneficial fungi 'root mass builder' and all I can say is wow. vigorous root growth and its not that expensive. (was $30 at a local store and the bag last a while only having to use it once a week) only thing is that it is powder, so you have to mix it like 2-3 hours before and shake it up or stir it to let it dissolve.

just throwin that out there