It's a lifesaver!! We spray once a month in the summer for the unmentionables and nothing comes near. If any do happen to pass by, they go up in flames!
We have also sprayed directly on an unmentionable (that one was a Goliath) and it immobilized it.
For the balcony, for example, after spraying you leave it for a few days without washing it, it probably needs a bit to "soak in" and it lasts for days.

Since I sprayed, I haven't seen any cockroaches again, not even dead ones. I sprayed inside the house and outside on the balcony. It also helped significantly with mosquitoes and the few ants that were around!

Very good product, at least for mosquitoes where I tried it, and I'm talking about Nea Plagia, Halkidiki, where we have a huge problem

It does the job. The problem I had was huge. In outdoor areas, lawn, gravel, etc. What you see is from the first day of application. The good thing is that on the second and third day in the same spot, more weeds had died, which means that the product still remains even after rain. Now I see very few walking, but we are talking about a very large area. About 300 square meters, in lawn and gravel. Also, I didn't use the quantity it said (by mistake), I sprayed about half of the recommended amount. I will buy another one, and I believe the problem will be completely solved.

We used it in the drains as the agronomist told us for big cockroaches that we had a problem with. It changed everything, nothing remained standing. Very good!