After years of using several different nutrient lines and organics, I use X Nutrients now. I make it even more simple than what it is intended. I use my 30-30-30 soil mix(30% Coco 30% potting soil I sift myself, and 30% perlite and add a few organic beneficials). I do not need the grow part during veg, a bit of Amino and a bit of Micro to push it a little. I tweeked the feeding schedule b/c I never go by them anyway, they are either way too hot or way too weak IMHO.
A member here has said only kids use X Nutrients, and I take by his immature behavoir he is a kid himself, at my age, anyone under 35 is a kid to me. I use it for obvious reasons as stated below.
It is affordable and produces the same results or better than most higher priced lines. I have ran H&G, GH, GO, AN(LOL), Technaflora(my 2nd choice), Roots Organics, Fox Farm(LOL), Botanicare, Humboldt(both organic and synthetic), and several organic mixes and teas. Bottom line, it works and is affordable. I have had slightly better results with Humboldt and H&G, however not to justify paying almost 3X what X costs. Honestly, if you are a serious grower and know your plants, any line will work if used properly. Soil and nutrients do not kill plants, growers do; just as soils and nutrients do not increase yields, growers and experience do. I have ran all these side by side with other lines and IMHO when the better results only produce a gm or 2 difference, it does not justify cost. IMO, find what works for you, but learn the basics of growing and learn the plant before blaming or giving credit to nutrients and soil mixes.