I haven't, but I am a big fan of single bottle stuff, whoever makes it. It tells me it is complete, stable, well thought out and not a rip off getting you to buy multiple products to do the ONE job. Other good ones are Organic Grow and Organic Bloom made by BAC, Bio Vega and Bio Flores made by Bio Canna and one of my favourites, Flora Nova Grow one part and Flora Nova Bloom one part made by GHE. All these "one part/one bottle" nutrients are really effective, concentrated and economical, due to not needing very much, meaning one bottle is enough for many, many plants or multiple grows. Being so concentrated, half recommended strength is more than adequate. Remember too, it is far easier to remedy a slight under feeding than it is to rescue a badly burnt plant that has been over fed.
I like recommending these products to new growers because they are so simple and effective too. There is plenty to learn when growing, so having to only open one bottle that will meet all of your plants requirements takes a lot of pressure off, compared to " mix part A with part B then part C and never part C with part B unless you have got some part A handy etc etc. Who would make growing so complicated? These sorts of products seem to me to be unstable and with real chances of something going wrong or running out of part B at the worst time - like knocking over a bottle right before a long weekend and everything is shut. Plus, I don't want to have a chemistry degree just to feed my plants and a million dollars worth of mixing and measuring equipment. That is why I recommend the one bottle stuff, just add 50ml in 2 gallons (or whatever) and feed your plants. Jobs done! Easy as!
Sorry for the ramble! I would say they have invested a lot of research and money and time in coming up with their product, before they put their name and reputation on the line and you could use this product with complete confidence. It is a crowded market place and your product would need to be better than good to survive or for even trying to break into the cannabis nutrient market to begin with.
Hope this helps,....... Organoman.