I too concur to the fact that SuperThrive... works fucking wonders.
I was also a non believer, well.. that is until I went and bought a bottle for myself.
Once I used it.. within a few days.. my plant was just more vibrant.. that's the best I can explain it.
The leafs seemed to be much bigger, the stems from the branches and even the main stem.. seemed to be more bulkier.
The shit does work.. and it contains alot of micro minerals and vitamins.. that Cannabis absolutely loves!
To be honest, I thought (right after I had bought the bottle of ST) I thought to myself, "alright, this shit smells really fucking strong.. and its probably going to kill my plant." However, I was wrong. It actually did just the opposite.. it brought out the full potential of my plant... and I'm not just saying this to get more people to use ST.. (i'm not gaining anything from talking about how well ST works).. I'm not a spokes person for the company in other words.. but I swear... that the one time that I have use SuperThrive.. when it came time to harvest.. I do believe that, that was my best grow and best harvest of all time.
If your careful with SuperThrive.. and don't over do it? you and your plant(S) will be just fine. Also, you'll be happy that you tried it.

I know I was!
I personally.. am a really really cautious person. I like to make sure everything is just right. Usually, if the bottle says use 2 drops/per gallon... I'll end up doing something like maybe 1 drop/per gallon.. I'm a true believer in "better safe than sorry".
But again, if any of you are a little skeptic about using ST on your plants.. trust me! It's worth it!
just my 2cents worth..
peace.