In my opinion, which is based on over 11 years of experience, DG makes the best
hydroponic plant food available to us. It also happens to work well in the dirt too. You're growing in promix and while I used to use Botanicare's Pure Blend in the dirt, DG only gives me
slightly better results while being easier to use. At the end of the day, I've got one easy to use food that works for my veggies, my meds, my house plants and my orchid.
Growing in promix isn't as much of an exact science like one can make hydroponic growing. You simply read the plant and feed accordingly. Speaking of plants, yours look great. Ask Tree to post his best plants grown with AN, you wont see anything near as good as yours. That's probably less about the plant food and more about grower's skill but you get my point.
You did well, I don't think someone at your level of experience can complain about a single thing given the quality that it looks like you just grew. I'd be interested in your final results in regards to yield and quality. I think you'll be surprised.
Think cannabis is hard to grow? This Cattleya took almost 3 years to bloom. DG of course