I used to use it years ago. Before they had the katalyst, to make it a 3 part series.
The EJ grow isn't OMRI rated so there are some chelating agents in it.
I liked it until i got to bloom, it was just so lacking in N, and i was growing haze at the time. So it really killed my ladies. Dropped fans way too fast.
The bloom is OMRI rated so it is safe for a true living orgainic grow. The quality of the buds was great, but i like my plants to stay green until i decide.
I would suggest having some other additives around to complete the feeding needs.
I have had better luck adding amendments to my soil. And just watering with water and compost tea. Than i ever had with bottles.
Not that EJ is a bad line! I'd like to play with it in the future as i've heard they have re-worked recipes since my last EJ encounter.