I asked ths same question a few days ago. From the very few answers I received, they seem to like the stuff. I also bought the startup kit and I had to order more within a few weeks. Several bottles were samples and if you use the formula they recomend, it runs out quick. I'm using a six gal res and changing every two weeks.
I'm over a month in and getting good results, but this is my first grow and have noyhing to compare too.
I also asked in my last post if there was a simpler 3 part mix and got no response. The mixes they recommend through out the grow are two parts of main products, BC Grow, BC Bloom, BC Boost, and one part of the supplements, Thrive alive, Awesome blossom.
I just thought it would be a simple three part mix. So how many different nutes does everybody use. Is three parts the norm or does everybody use five or six or more?