My first time using an organic fertilizer, I don't know of I liked it, the plants looked happy, but they also look happy if they get mineral nutrients.
Environmental reason are still viable, mineral fertilizer are bad for our habitat.
That being said, I would not use organic fertilizer for an indoor grow and I permanently think that they are not completely suitable for tank bases systems.
My experience was quite messy from time to time.
Tldr: presumably good for the environment, but messy and pricey