Too be honest, I used gh mostly because of price and accesability. I do use the bpn 3part and dynagrow. I like the dynagrow for veg because its a one part which is super easy to use but for flowering it gets too pricy. I have used an, earthjuice and 2 others and results are pretty much the same. A good quality nute is a good nute so price and access are my primary factors. Every time I go up to 1400ppm I get burned lol. I can only go that high with using additives like calmag or epsom salts and never see a big difference. Epsom salts suck, just a waste of raw material if your using high quality nutes. Epsom salts is magnesium sulfate in the raw, good nutes are refined and derived from magnesium sulfate so use the salts for your feet and your lawn. Calmag, if you do a waterchange with good nutes every 7 to 10 days you are wasting your money if your using calmag. 1300ppm works well for me and plant asperation or water intake slowly raises ppm to 1350 or 1375 before I dilute with water. With the bpn I like setting the 3part at 1200 to 1250 and add the blue booster til I achieve 1300. If I add too much water during dilution in the middle of the week I adjust with the booster only. This is the easiest way for me to use booster like the bpn blue, bloombastic and others that effect ppm count. I stay away from organics, they just don't work well with hydro and makes your ec meter worthless. Organics work best with drain to waste systems and soil or soiless mediums. Nutes and boosters are hyped up like gnc muscle crap for people working out. A good diet and workout builds muscle, stuff in the bottle is hype in the bottle. Americans like hype, does nike make you run faster than addidas? My best gardening is when I make very little mistakes and don't get lazy with the work, my worst gardening is when I get lazy or push the nutes to 1400 or more. The hype in a bottle can only help in very small percentages if at all and when abused it only hurt the grow. I don't promote any brand unless they give me free stuff or a discount. BPN did give me free stuff sort of but I won it a number of times lol. I can say this, bpn is a good nute.