Here I had to find positive and negative aspects. Positive is quite clear that for a few seconds comes out a very broad and strong beam, I did not have the impression that it would be so difficult to meet someone. Even if you're nervous, in a dangerous situation should succeed relatively easily in any case, to meet the enemy. The safety lock I have not tested, but according to the description on the packaging should be it can indeed push for emergency. However, if you know that you can go with your finger just below the safety lock, is that I do not think absolutely necessary.
The button was gently press and lift the safety lock effortlessly with the thumb, to get to the button.
Positive, and at the same time but also negative, is that the spray appears to be very strong. Negative, I find it especially because the hole where the spray emerges, unfortunately remain relatively obvious delays that do not disappear with a simple wipe. After a few hours of the test, the spray still smells very strongly to the opening on the content. Merely smelling the hole enough to cause mild nasal irritation with me. When I spray in the car drove homecoming, so immediately after the test, I had both windows open wide, because the spray has really stunk relatively strong after the pepper spray.
Is still negative, that I mean to have a tiny bit of it gotten the finger. My finger was in the immediate vicinity of the finger, which has pressed the button has, in any case smelled a bit like pepper / chilli.
Overall I think that you should really be careful in tumultuous situations that you or innocent people gotten nothing near it. In any case, you should then leaving the place as quickly as possible and the spray as much as possible wipe with a (preferably wet) cloth. The spray is already relatively strong in the air, and as described, it just remain residues directly on the box, which I think is something ugly and not optimally implemented.
But, in summary again: It is very effective against attackers. And that's the most important thing! :)