Yes, the spray is more expensive than the other sprays. Despite strong buy recommendation. This spray use professionals. If the spray be been used, the offender may be denied nothing. It is colored green. That can not other sprays. Thus denying futile. This spray also contains 90 ml If you, which makes it a spray with spray -. Not with fog - is not equal to hit the "Black", you have due to the longer discharge time but still have a chance. Perhaps suffice smaller amounts, such as 45 ml for experienced sprayer. A few more seconds spraying time are beneficial for the absolute beginner. This spray sprayed a steel - no fog. The fog function I think not suitable for beginners, because you may own some of it would collect with. This danger is not likely given the spray. Another plus point: the spray bottle is still small enough to put them in a purse or pocket can. Other products often have only 40 ml, but are almost as large. The spray is relatively narrow, but only a few cm longer. (Comparison: another product with 40 ml content is 11,5 cm long, with 90 ml of this content is here 14.5 cm long Both sprays are no 4cm wide..) The spray head is also super safe. Inadvertent Lossprühen can not really happen, because you have to lock the head fold part to lossprayen can (but what would work when using a pointer). Other products are even backed up, but here you have to cross the Plastiksprühkopf by press coverage, so it breaks at the perforation and one reaches the spray head only by fully pressing. Here, however, no production error may exist, because otherwise the cover will not break possibly. I think the solution here at the "Fox Labs Mean Green 90ml beam" safer to handle. It has been in an emergency after all only an attempt.