I rate it in the worst possible way because: if you don't read the instructions, which are written in a font for bats, the same thing will happen to you as it happened to me. You will open a hole in the conical nozzle of the canister and put it in the gun, expecting it to work, which will not happen no matter how much you pull the trigger... When you realize that something is wrong, it will be too late, the damage will have been done. So much pressure will have accumulated in the canister that it will push the material out from the side of the piston and it will smear both the gun and your hands, and in the end, instead of repelling pigeons, it will repel you and your nervous system.

Then, out of frustration, you will refer to the instructions where it tells you that (for God's sake) it has an internal membrane that you need to puncture with a wire by passing it through the nozzle that you have already punctured... and you will tell me that since it says it in the instructions, it's your fault... but I have used such canisters many times and I have never seen such a stupid approach...

As for the product itself, I have no opinion since I just applied it, that is, what was left. It is also excessively expensive for a chemical gel, which is expected since it is sold in a pet shop under the category of seaweed for silk ribbons.