Got my LaserMax for my G20 yesterday. Good news. Installed according to simple instructions. Good news. Dot sat right on top of my iron sights in the middle of the sight. Good News. Pushing the slide stop lever to turn them. Without the slide on worked very well once the slide was on the frame found the switch was very stiff and would be a distraction in a SD situation. Checked and rechecked the installation and I did it correctly. Bad news. PM'd lasermax1 here on GT he responded during the night and had already talked to warranty at LM. Good news. Called Bob at LM and he is sending me a new battery cap, slide stop spring and slide stop lever. Good news. Bad news is that this all happened right out of the box. With holding final opinion until parts arrive and see if situation improves with G20. I have 3 CT lasers and all worked great out of the box and have had 1 problem in 2 years and sight was replaced FOC. CT 2/3 the price and Customer Service is as good as LM. Benefit of LM is does not change the grip.