Superthrive, IMO, is the bizzomb! I bought a bottle for $11 and I used maybe 1/4 of it all season. I didn't really have to water my plants this summer because we got a lot of rain, but I misted them with Superthrive water a few times a week. They loooved it! For comparison, I used it on all my other plants, and they went crazy.
It seems, to me, to provoke vertical growth, so be careful with using it too early in veg or your plants may stretch more than you want. I have not used it since the plants went into flower. Oh, and basically it's just a lot of vitamins. It's not a fertilizer. I used worm castings for that.