Howdy
@Scouse05 and welcome to the Farm!
Yeah it's good stuff. Use about half strength as recommended by their feeding charts, and increase/decrease as needed. Emerald Goddess is wonderful especially foliar fed. Sturdy Stalk is a great potassium silicate that can be used at the roots and as a foliar spray. Their pH down is just as strong if not stronger than Advanced Nutrients' so a few drops usually is all it takes and a bottle will last a very long time.
I prefer their 2 part Cali-Pro series over their 3 part series. I don't bother with bloom, either. Just use the veg Cali-Pro 2 part series and supplement with Emerald Goddess. Oh and their Cal-Mag is good (if you need it) but there's cheaper options out there. Like Botanicare CalMag+ which works fine and is almost half the price.
I wouldn't waste money on king kola it's ok but not worth the price - you don't need it.