I have solid complaints about Lasermax reliability. First, the batteries die fast. Second, the cap that holds the batteries in falls apart. Third, the weird little bar that operates the laser can slide out of the gun and become inoperative.
All three of these things have happened to me, and I only have one Lasermax. That's pretty bad.
The only bonus is that the Lasermax guide rod is better than the Glock. I have had two Glock guide rods fail, and I haven't had many Glocks.
I've never been a fan of laser sights and think most people use them as a crutch thinking they will make them a better shot. Nothing could be farther from the truth
It gives you an alternative to the sights when it's dark. In this respect, I like it better than night sights. A laser will light up the target to some extent, so you'll know what you're aiming at. Night sights will not help you see the target.