I don't have a set for my G23 (yet). However, I have an older design on a 1911A-1 that I carried for several years. Other than the odd switch location (which has been changed), I have no complaints.
The problem that some people have with the CT lasers is the fact that the laser is offset to the side, so the point of impact will shift left or right of the dot, depending upon the distance to the target. I overcame that by sighting the gun in so that the bullet hits slightly to the left of the dot at all ranges.
The laser is well constructed, and gives you plenty of warning time before a battery change is needed.
One other point. Don't lose that tiny #$%@#$%#%#% wrench!