They're "a benefit".. no matter
...
I have CT grips on my Sig P229 9mm, and can only say that whether using just the 3-dot sights or the laser, the accuracy is there. The big bonus of the laser, least the model grips I have, side buttons, is that I can shoot the gun without activating them using the normal 2 hand grip, or IF I need full SA, both eyes open, I can point, then light up the target and get off several shots, very much, on target, point of laser, and then release the button pressure, just as fast as not to leave a light trail back.
If one can afford them, get past the fact they will humble anyone's perception of a perfectly held aiming point (it will show every movement, aim wise,) and not chase the red dot, which will show trigger jerking, and trust the smooth squeezing off method, needed for constant accuracy, one will get hits close to perfect, and perfect, all the time, from just below chin level or waist level, shooting.
As mentioned, they are an excellent learning tool in grip, aim, and smooth trigger pulls, but they do/will show non-perfection with the slightest movement or trigger-jerk i.e chasing the red dot..
Get past what others will see, past one re-learning gun technique, and past hurrying the shots, and one will reap their use and accuracy with a point and shoot, both eyes open, for far better SA combined with deadly accuracy within 1" or better, of direct bulls eye shots, be them one shot, or multiple shots, with speed.
As far as the what IF question of batteries failing, etc., I can only tell you that the ones that came with my grips and the gun, 2yrs ago, are the original batteries, thru some 5200 flawless rounds, of which, my estimate of shots using the laser are somewhere around the 500 mark and estimating 3 secs of actual laser use per shot, with a battery life of somewhere between 4 - 5hrs of "continuous use" tells me, this is true.
I intend to use them until they fail, as a means of "knowing what to expect", use wise, of the next fresh set of batteries, along with known, aprox. round count, with use of them.
The best assurance they have taught me, given me, is my ability to quickly point and shoot, both eyes open, without actually using them, but they do verify, very quickly, as to my aiming accuracy, and the accuracy of both, using the sights, using the laser, or none of the above, and just pointing and shooting at ranges out to 18ft, give or take, at times.
Also, as mentioned, IF one has not-so-good eye sight i.e. getting focus on the front sight, via glasses, they do point the way for one can see clearly with, or without, use of their glasses.
Ls
