Overall I am quite impressed with the little laser/flashlight combo. I am especially surprised by how bright both the laser and the flashlight are for its size. This thing is SMALL. I also really like the green laser, which is much more visible to me personally that my other red laser sights are, which is what all of the ones I have owned previously have been.The sight came well packaged and includes both a USB cable for charging and the necessary Allen wrenches for both mounting and alignment. It would be nice if it had had a magnetic charging port, but micro-USB works fine. The on/off controls are located on either side of the site and have just enough projection and feedback to be effective without being obtrusive.For a smaller gun like a Glock 19 or a similar or smaller compact, this should be almost a perfect fit. Honestly, it is small enough that if a Glock 42 had rails, this would fit just fine (me wishing that Glock 42's had rails....). For a more full size pistol like a Glock 17, this mounts fine but has to sit well ahead of the trigger guard. I also prefer to mount lasers with the rear lips around the trigger guard for stability, which is impossible with a larger gun due to this lasers small size. It does have two different holes for the mounting pin, which allows at least some degree of adjustment. That said, it will likely still mount just fine on a larger gun, but it may look a bit odd.In summary I am quite impressed with this little sight and I like it a lot. It is very bright and seems quite well made. For a compact or midsized pistol, it is almost perfectly sized. For a larger gun, it will still work but the mounting may not be optimal.Looking forward to taking it to the range and sighting it in!