I switched from Crimson Trace to Lasermax on my Glocks.
I installed a Lasermax on a Glock. It worked OK but the extended slide lock switch tended to operate in my C-Tac holster. I felt the battery would most likely die quickly if I carried it, so I returned it to the vendor.
Another drawback to the Lasermax, in my opinion, is that one must consciously turn it on when drawing in a potentially stressful situation. Does the Crimson Trace activate automatically by gripping it?