I have not run a full cycle with Megacrop so I'm basing this comment on the materials listed on the ingredients panel along with the PPM calculator on their website. But, I am currently using it on a variety a plant species this season and am looking forward to the results. So, you can expect some confirmation bias here .
With the inclusion of what appears to be quality components including the use of magnesium nitrates, amino acid chelated micronutrients, chitosan, vitamin complexes, amino acids, etc the Megacrop really is a full spectrum fertilizer. They appear to be using the better, more plant available, nutrients. I haven't seen a single product like this on the market from other manufacturers. You would have to buy several additional products from other manufacturers to match it.
It's a fixed ratio so if you are used to adjusting your NPK ratios through the growing season, I could see where it would become more cumbersome to figure out where things are. And, this might not be optimal depending on the growing style and media. Maybe you don't need or want the organics. And, pushing the ammonium ratios (i.e. urea) is not always a bad thing, depending. nitrogen_form.pdf
I have in the past purchased each of the components (in relative bulk quantities) that they are using in their formulation with the exception of the amino chelates (have DPTA, EDTA). And, I have calculated the run cost. I will comment that you might be able to formulate a similar mixture at around half the cost at the current 21.7lbs price but I'd also be ignoring the cost of the labor, equipment, packaging, the more expensive chelates, the specialty items (to include the chitosan, vitamins, and amino acids), and the profit margin.
For what it is, I find the formulation to be good, with unique features, and I personally don't find the pricing to be out-of-line, rather inexpensive, at the larger quantities.