I'm currently using their nutrients. Some plants love it other plants seem to not like it. All of my plants have been started from seed and I utilize Rooted Leaf as the primary feed with Calcium Carbonate, Cal-Phos, and Calcium Sulphate to supplement. Substrate that I use is coco/peat blend no perlite.
Also biggest disclaimer, you cannot keep feed mixed for more than 6 hours in the heat. If kept away from light and cold it will last longer. Their base nutrients can be mixed in the solution for a whole day but none of the additives except the silicone can be in there.
No pH of the water is required but leaves are light green and adding any nitrogen will induce clawing. Nutes are hard to balance but if you reach out to the company Nik the guy on the videoes will email you loads of information. I'm not sold on them but not ready to drop the money going full organic.