Granted that MegaCrop's older formula (hard to dissolve white chunks) posed some problems, but I've been using it it for over a year now with great results. I run 4 gallon coco hempy buckets dtw. I make up a 35 gallon reservoir by diving the MC between 4 1 gallon jugs of HOT water, shake them up and let them sit for a few minutes, shake them up again and pour them into the reservoir and fill it with room temperature dechlorinated water. I use a paddle mixer before feeding for the first couple of days ... I know it sounds like a pain, but it doesn't take much time and results are well worth the effort.
I won't be trying the new formulation until Oct/Nov ... tents are down for the next few months ... but I expect it to be as good or better then the old formula.