I actually started using maxibloom inspired by Micks journal many years ago, but in dwc from seed to harvest. I know another user in overgrow.com who also uses it from seed to harvest along with gypsum in coco and beautiful plants. I did try his mix but I don't think it fits my plants well..
I seriously dont doubt maxiblooms capability. I suppose the problem lies in the user. Being dry salts, unlike jack's or masterblend, maxibloom seriously begins to deteriorate once moisture sets in the bag and one needs to store it well in an airtight container along with desiccant or paper to absorb moisture. I noticed the top portion of the salts in the bag being all clumpy with moisture and split only that bit into another bag and continued using it over the last 1-2 weeks. I noticed it wasn't mixing well and the usual pink color was replaced with a very light orange color. I just dumped that today and began using the good part which I kept aside and it mixed well and had the usual pink color. I just watered my plants ph'd at 5.8..fingers crossed...