This is my second TLR-7. I now have one for my side arm and one for my hog gun. Controls are easy to operate and the light is plenty bright. It is the best cost to size to brightness ratio on a light I have found so far, hence having two. I've dropped the other one a few times and it has experienced over 1k rounds of recoil. Light stays on tight and hasn't given out on me yet. It is easy to activate with the support thumb on a pistol as well as on a long gun using a C grip. I highly recommend this light if you aren't ready to take a full plunge into something like a SureFire.
Streamlight is always a quality product. This particular model is perfect for a pistol when all you want is a bright light without a laser. Adds very little weight and is easy to mount in all types of pistols. Easy to follow directions and everything you will need to adapt for whatever brand / model pistol you own that has rails. Quality you can count on.