biobizz is good, but you might get better results if you also supplement their product line with some others, and perhaps leave some out.
Their base nutes are good and not expensive. I have moved to using biotabs product line as my major nute source, but i supplement it with these still and they are my go-to organic liquid nute. HOWEVER i truly hate how thick and sticky and messy biogrow is.
Alg-a-mic + acti-vera combo seems really good and not that expensive(works in soil and foliar fed), you could instead use something like velokelp, but it might be a bit more expensive. From what i have heard its about equally good as those two together and can replace them basically. These are my go-to for kelp and similar stuff, also acti-vera besides having other goods in it, it makes the water wet things more easily, meaning that it doesent leave dry spots in soil as easily if you dont water properly.
Bioheaven i cant say is good or not, but its pretty expensive and im sure there are better and cheaper alternatives to replace this(i have replaced this).
Leafcoat i did not like, while it kept leafs green, they also became fragile and would snap in half. That might be due to some other issues i had at the time, like the high heat + low humidity that caused it. I have some left, but will only use in emergency of mites or that sort of stuff, not try to heal not that healthy plants with this anymore.
Topmax seems something that could also be replaced(and i have replaced), hard to say is its better or worse than its competition with my experience.
Their rooting product(bioroot was it?), well i dont really see difference when using that or other similar products with good reputation. Its not overly expensive imo, so why not?
I really also like how biobizz base nutes can feed living soil with molasses etc stuff that soil likes, so i think they make a great supplement for super soils. However ideally you would want to make a super soil that does not require any liquid NPK supplements and you can find other ways to feed the soil than biobizz nutes. But you might run into a situation where you might want to add some NPK even with them.
Good supersoil > biobizz(but good supersoil is likely better than any other brands as well), but if you dont have the experience with making supersoil or dont care to learn to do it properly, then chances are that biobizz will do you better and i doubt you would see a big difference between good supersoil grown weed and well grown using biobizz. Plenty of people grow fire with biobizz, its more about skills INCLUDING skills in using what ever you use, not only general growing skills.