I liked the Princeton Tec “Switch” right out of the package, as I noticed it resolved several issues that I’ve had with other lights that purport to have the same functionality. The Switch is also more versatile than similar products, as it can be mounted on a helmet, on your kit, or, with a special attachment, on your rifle as a last ditch gun light. Some of the issues I’ve had with other lights of this type are that they are too easy to Accidentally Discharge (potentially compromising your patrol), that they are not bright enough, and that they are limited in how they can be used.