It's my first time growing, so I'm not really sure if this made it "better." So for my next grows I'll use it on one and not the other to make a side by side comparison.
If it weren't for this product there's a good chance I would've lost my baby. If your grow conditions are too hot or too cold, I highly recommend this.
These nutrients are just amazing! As for rapid start, I'm not 100% sure it did anything using it late in the flower stage. I'll have to experiment some more with this product.