I've been on a quest to find a powdered soluble fertilizer with biostimulants included. I have used several including Veg+Bloom and One Way To Grow. I am finishing up a run with Greenleaf Megacrop, which turned out very well.
Yes, they are the guys that used to sell Advanced copycat nutes for cheaper. Don't let that fool you, this stuff is good. It has aminos, silica, B-vitamins, chitosan, kelp, enzymes and an NPK that is suitable from start to finish.
The drawbacks I can think of are not using humics, which don't play well with chitosan/silica in this fertilizer. It is also hard to balance the proper ppm of N in flower. They put up a calculator on their website to help with that.
I personally tried it and will be using it as my base fertilizer. Has anyone else tried this stuff?