The Good
Clear and easy to follow instructions. Consistent and repeatable results.
The Bad
The high end of the curve is a little to spread out. I suggest diluting the 500 so there is one that falls between the 200 and 500.
The Bottom Line
Great product that produced repeatable and consistent results. This product is meant for blood but can just as easily be used for saliva. Instructions are clear and can be trusted. I would recommend this product.