The duster seemed to be higher quality than i was expecting, but being inexperienced with it, i really didn't know how to judge how much product i was applying to an area. The concentrate for the sprayer was easy to mix and apply. The hardest part was understanding the exact dilution recommended. While there were instructions, I didn't find them quite specific enough. As though it was written for professionals who do this all the time. Not someone who busts out the garden sprayer once a year. Nevertheless, I used a 1 packet/gal dilution and it did infact kill the box elder bugs in the infested areas. Really, this product works great. It would be 5 star if perhaps the instructions were a little more newbie friendly.