I've used it in every batch for a year because I believe it works. But I've never NOT used it either, so have no comparison. As far as it goes scientifically, it makes sense to boost the PK values in the optimum growth opportunities. So, if I went a run without it, I would personally feel like I'm leaving out.
Will I keep buying Bloombastic? 50% say yes (used it for a year solid) and 50% of me says; "Get another PK boost for half the price"
Again, I must say.. I do really love the smell of Bloombastic!