I have the T10 as well as the Fenix L2D and L1D. I love the T10 particularly because I don't need all the different light levels, even though it offers 5. Unlike the Fenix, once you select the level you need, the light remembers that level so that the next time you turn the light you start with that level, rather than having to cycle through the different levels. Of course, you can change the level if you like, but I find that 90 percent of the time, I use the same setting, so why fool with cycling the light like you must with the Fenix. The only negatives with the T10 that I have found is the clicky is a bit stiff. I did get used to it but it required me to use the very tip of my thumb with vertical downward pressure in order to switch the light. If placed horizontally on the botten, my thumb could not press it down far enough to get the light to work. Another thing: while there may be some variation in the color of the different Q5 LED's, my T10 is a bit colder in color than my Fenix.