Welcome to the forum!
Well, you get 10mcg of -none per drop, with up to a 5% margin of error (if you work out the numbers, this really isn’t so bad - you’re talking 9.5mcg to 10.5mcg per drop).
It’s a little more diffusive that some oil products you may have used. I do add some diffusion enhancers, to ensure a “cleaner, fuller burn” of the androstenone. I’ll get into -none diffusion issues in a moment.
While I have great respect for some companies such as LaCroy, I’m not sure some other companies have that much QC over their batch strength.
When I was a mere enthusiast and used other brands regularly, I’d get inconsistencies between different batches of the same product that were difficult to understand. One bottle might “work some magic” for me, and the next wouldn’t. It was unusual.
We solve the batch inconsistency problem with something old fashioned called: anal retentiveness. 
You’d be surprised how far old fashioned concepts like this take you in the quality control department. As far as pheromones go, which are so dose sensitive, you’d swear that being circumspect was some kind of magic. It really helps a ton.
Anyway, while being profoundly concerned about quality, and creating the dosed concept are a great next step to creating a bonafide pheromone technlogy… in some ways, you can’t completely remove the “crap shoot” feel with at least one pheromone.
Yes, most pheromone molecules you can whip into shape, and create something reliable with. It’s mostly androstenone that’s still relucant.
Not only do some people come off as overbearing and obvious when wearing androstenone, but the molecule itself is difficult to work with. You can’t accuse androstenone of being two faced!
You know how superglue just loves your skin more than anything else on earth? Androstenone is very similar. It has a high “affinity” for the skin, and hangs onto you like spiderman.
It doesn’t like jumping ship from your skin to the air around you (diffusing). You could say that androstenone loves to “hang out” and hates to go.
The idea of “buildup” is very real with androstenone, both in terms of what happens on your skin… and under, when some of the -none absorbs. It can literally sit around happily on your skin for 3 days or more without completing diffusing.
We already have some additives from the fragrance industry that help with diffusion, both in our oil and spray line, but I think there’s still aways to go with -none. Ultimately, I hope to hire a chemical physicist that can work out the androstenone diffusion problem better.
Until then, that’s another reason why dosing is extra critical.
It’s not a perfect solution, but with dosing, you can at least get a sense for and work WITH your buildup… your own ebb and flow of androstenone.
If you wear 15mcg of -none one day, it’s likely you may need only (as an example) 10mcg the next, depending upon what your body chemistry does to the -none. The third day, you may need only 5mcg. Fourth day, you take a break.
It helps a great deal if you learn to smell androstenone (most people can learn). That way you can better determine how long it literally “sticks around”, and how much you need for the effects you want.