To grow good big buds, you need a few very simple basic things.
1. The correct photoperiod (the right amount of light hours)
2. Proper lighting
3. A good environment in terms of temp and humidity and fresh air.
4. A good well suited growing medium to you and your plants needs.
5. The right amount of base ferts N P K for the plants needs at any given stage of the plants life.
6. The right ratio of secondary and trace nutrients.
Thats it!
There is no need for all these stupid additives, huge buds have been grown indoors for decades, long before this crazy idea that wasting loads of money and throwing everything but the kitchen sink at your plants not to mention making the fatcats wallets much heavier will give you better yields and or healthier plants, its just rediculous!
I too have used all sorts of additives and iv yet to find one that actually does what it says it does, i get good buds with two bottles, grow and bloom, and i feel like a mug for spending money on the other shit.
But carry on, spend your hard earned money on waste and useless by-products of the sugar refining and chemical industry, because thats all these products are, shit that nobody else wants!
Maybe AN and other over-priced and over-rated products may be good if you dont understand the above requirements that your plants need or you dont have the experience or just the plain old common sense to get this right but to an experienced and established grower theyre just BULLSHIT, end of.
And remember, all this shit you throw at your plants you are smoking at the end of the day in the final product!

And you wanna pay through your teeth for this privaledge?? lmfao