It's effectively an exact clone of General Hydroponics 3-part Flora series. My guess is that after hearing whiners complain about the price difference between that and AN's Grow/Micro/Bloom 3-part AN decided to show everyone that if they make something the same quality (ie lower quality) that GH does they can do it cheaper.
I've never been all that big a fan of GH's Flora series myself. I much prefer AN's nutes. But for what it is, and for the price, you can't really beat Jungle Juice IMHO. (I still recommend their pH Perfect nutes if you have the budget for it.)