The tail cap switch is very small and difficult to depress. It is tough to hold in a depressed position for more than a few seconds and is a problem with gloves. Output is great and the different strobe functions (red/blue/white) are great for signaling. If you are willing to deal with the hassle of pushing hard on the small tail cap switch and struggling to keep it pressed when you want to use it in momentary mode, it is a good overall light. I just used it for a month of night work and it got quite a workout. Battery life is above average and thus far it is holding up good. It is shame the tail cap switch basically sucks. It took this review from a solid 5 to barely a 4 (because I can't give it a 3.5). No way around its biggest weakness, you have to press the crappy, tiny, hard button to use what would be an otherwise great light. I have previously owned and used multiple lights from Surefire, Streamlight, and my last light (a great light but it finally went after 5 years) was an Insight H2X (the rebranded Gladius).
Pros: Great for signaling and good output
Cons: tailcap switch is small and difficult to depress and hold
This review was written in the old system and had content requirements that are different than reviews written today.