Nice entry level product but not something i want on my gun - Defender Series by Crimson Trace Fits Glock- Accu-Guard Laser Sight

Let me start by stating three things:

1. This product sells for about $100.
2. This product works as well as you would expect for something that costs $100.
3. You get what you pay for.

For the novelty of it, I wanted to attach a laser sight to my Glock 17 Gen 4. I got the DS-121 and immediately attached it to the firearm. It was more difficult opening the blister package than it was to install it on my firearm. I used it at the range and it worked well enough. Then I noticed that it would turn off after a few consecutive shots. I would turn it back on, only to have it turn off again. Finally, I gave up and took it off the gun.

Short Review: Nice novelty, but not much more. Spotty performance shows that you get what you pay for.
The Good: Price, ease of installation, adjustments.
The Bad: Spotty, inconsistent performance.
The Ugly: Laser would not stay on after consecutive shots.