Be careful when companies say they only use organic. The only organic things I know of go out of the atmosphere in 2-3 days ; many companies spike the tanks with pesticides.
It depends on the size of your property and what they are using. Organics do cost more and you would need to do it more often than pesticide. Some pesticides are better than others. Also depending on where you are and what they are suing, neighbours need to be notified that your property is being sprayed. If you buy the material in a big box store ; you should flag your property.