First, it works
Second, it’s a minimal chore to mix the reagents, simple—-but I am a scientist
Third, there are only 2 bottles of powdered reagent, and this means (if following the directions) one can only test TWO times. The mixture is a large volume so A lot can be tested, But apparently the reagents don’t last once mixed and need to be discarded.
For the price, wish I had about five separate containers of powder reagent and appropriate matching volume of liquid reagent.