I've only been using the Part A for a couple of weeks but I am able to give small amount of feedback at this point.
I believe that I am really noticing the availability of the amino-chelated magnesium. I'm too lazy to pull it up but the percentage is a little over 7% if I recall correctly, which makes it one of the highest magnesium-by-percentage fertilizers I have ever used. The leaves are extra lush and dark green with a nice sheen to them. Not dark green in an overly fed way, but instead a very healthy look, complete with praying and perfect tips. Sorry, don't have pics so you just have to trust me.

Obviously two weeks is not much time to make a realistic assessment of how well it works but so far I am very pleased and wanted to share.
Current formula (for ProMix HP):
Water once per day on a two day cycle feed and "flush" schedule.
Day 1: 0.9 EC Dynagro Foliage Pro + 0.5 EC MegaCrop Part A (1.4 combined EC)
Day 2: 0.2 EC calcium nitrate (Botanicare Kind base) "flush"
Lots of runoff and Ph is adjusted up using Potassium Silicate until end of stretch and Potassium Hydroxide thereafter.
thanks for reading!
Edit: Forgot the most important part. It's a new strain from seed but so far at 3 1/2 weeks flower development looks very respectable for the amount of time. No complaints.