There are a lot of opinions on lasers, and some feel very strongly.
I can understand some of the naysayers...but I can also see the potential upside.
If you have trained extensively to focus on the front sight, the laser may or may not be very beneficial...or it may be a distraction, causing you to shift your focus.
If, however, as some say, in a real life SD situation, you focus on the threat, then perhaps that red dot is your best friend...
I only own one CT-equipped gun, and i will tell you what I think the CT's biggest advantage is.
From time to time, I take that pistol (3" alloy framed Kimber 1911), double/triple check that it is unloaded, and then look across the room at a small object--a doorknob, light switch, etc. I raise the handgun and point it at the selected object...not raising to eye level, not using iron sights...just simulating point shooting. Then I press the magic button and see where the red dot is relative to my "point".
Usually, the first time or two I am off by a couple inches... but within five reps, I am amazingly "on". If I do this once a month, it takes very little refresher training. If I do it every two weeks...so much the better.
I seldom carry that pistol, but since I do carry a 1911 every day, the training is very transferrable.
I also try to practice a bit of point shooting each range session. Regardless of handgun, I do fairly well, but the more often I do it, the better I am...no surprise here.
Bottom line...I don't need a CT on every handgun. Not to say I wouldn't take them if they were giving them away.
But having one, and using it to best advantage while training...is not a bad thing.
Best regards, Rich