After a lot of searching and comparing I finally decided to settle on the TLR-1 w/ the strobe function versus getting one with the laser option. My first impression on opening the package and holding the light was that it is a sturdy light. It does not feel cheap and have a clean look to it. I bought this light for my Sig P320 Compact and it fits perfectly. The light came preset for a Glock rail, but had the adapter keys for the other rails as described in the description. Only took about 2 minutes to swap out, mostly my fault due to not ensuring the hex nut was flush before installing the key as the directions stated. The light does extend a past the barrel/frame but I do have the compact frame so it was expected. I imagine with a full size frame it would be close to flush with the frame/barrel. The flip switch is very easy to manipulate to use either steady on, momentary, or strobe with a single finger. When activated, the light is very bright! Even in a well lit room during the day, you can see the beam on the wall across the room. The same can be said for the strobe function as it is just a bright and very disorienting. I have not shot yet with the light attached so I cannot speak to how it affects the muzzle flip, but based on the weight it add to the front of the gun I have a feeling it will stabilize the flip some.