I've been using heavy 16 since 2010 and haven't gone back to anything else. I used canna before and it totally blows it out of the water. I use the entire lineup now except the foliar spray as I have seen no noticeable difference when not using it. I also use the Heavy Fire blooming addative that just came out, the bottle I have actually says "preview" on it. I used in in coco top feed system and Im currently using it in Fox farm ocean forest. I got hooked on the stuff when I lived in Santa Barbara and went the hydro store I went to(greencoast) was giving out samples because they are friends with the manufacturer. They also have a new additive coming out that is a root excel replacement and supposed to be better with more beneficial stuff in it to blow roots out and protect roots. This stuff is all over southern california hydro shops, uo here in Northern cali it's a little harder to find but there are several online retailers who have a great price on it.
hydrobuilder.com and
igrowhydro.com have it at a significant discount over the hydro stores. I agree with the previously stated drawbacks.
1. Most expensive nutrient line, my guess is because it is handcrafted and it's new and not a big company.
2.Not very many do use it, this has not affected my that bad because I have been fortunate enough to have friends who are master growers use the stuff and have helped me out. I am also able to answer some questions.
3. I have never had problems with ph they actually advertise that is should self ph when using the same ammount of a+B and for the most part it really works. I am on well water that come out the tap at 7-7.2 and 75 ppm after adding roots excel, greatwhite, Heavy 16 Prime, Heavy 16 Fire, Canna Cannazyme, and Heavy Bud a+b my ph comes out to 6.2 - 6.3 and I don't even adjust it and it works great.
4. Yes the bottles are extremely hard to pour it pisses my off how much spillagae I get. For the 1l bottle I have found that taking the top from the Log Cabin syrup bottle and puttting on the 1L bottles works great for pouring. any bottle top that fits would work just poke a small hole in it for pouring. The 4L and larger bottles are even worse I just pour it into a large measuring cup then use that to measure into a smaller shotglass measuring cup.
picture taken before i got the heavy fire but that is in my lineup now.
blackberry kush from my last grow with heavy 16 now im growing XXX OG and will update my grow journal tonight, Also using heavy 16 lineup.