JohnBlitz and LeeLapin provided you with some good insight, and Averageman brought up a point to consider. I'd like to add a few things.
My wife just got the piece she wants to carry, a Smith 649. But she wanted either thicker padded grips or longer grips or preferably, both. So new grips were in order. The laser was something I showed her so she knew all her options, and considering the price of a set of nice, new grips, and the fact the laser grips come in four styles for J-frames, she went ahead with the CT grips after some thought.
Now she practices from time to time, she isn't as into it as me, but she knows how to use it. The laser obviously isn't a replacement for practice and training and working on fundamentals. But considering she knows how to aim using irons and does okay with them, and the fact she knows how to point shoot, the laser became an asset and not a hinderance. If it works, it gives her an added level of assurance her point shot under stress will on the mark, and if it doesn't, she'll still be able to do what she needs to do --she isn't dependent on it.
That said, you still need to keep hot batteries in it, she's been carrying a 2 cell surefire light in her purse too for a while now, years, and she always carries a pair of extras. If you carry a weapon with electronics on it that uses batteries, you NEED to carry extra batteries. This is even more important with reflex sights and such, where you may in fact depend on it.
Now the laser does act as a deterrent. Most robbers and crooks aren't super skilled criminals, and they don't spend a lot of time at the range. They get a lot of their firearm info from movies and games, and movies and games taught them that "dancing red dots" mean certain death. When those hit the target, the bad guy either surrenders or gets killed, there is no other popular scenario. Cheap I know, but hey, it works and the explanation fits...
The red dots can and will wash out on bright targets and black targets in very bright light, like a summer day. No doubt about it. They work best between dusk and dawn, indoors, cloudy days, etc. Which is when a lot of crime occurs, but who knows? It could happen anytime. Which is why it is important not to depend on these grips --you got 'em so use 'em, but use them in conjunction with point shooting and aimed shooting; never draw and fire the laser in absence of some kind of a traditional firing position unless an emergency. Basically, these grips work great with point shooting, if you practice point shooting these will really add to that, and if the laser fails or it is washed out or whatever, all is not lost. Just point shoot without the laser. My wife, she practices with and without the laser, SA and DA, and aimed and point shooting.
My wife, she loves hers, and she gets a little tighter groups using the CT grips at 7y as she does using aimed fire at 7y, but again, she isn't as practiced as I am, and the snub revolvers require a lot of practice to handle well and shoot accurate anyway. I have a 340PD, and I'd like the thicker padding of their smaller grips, and using her 649 I can see how the CT grips may benefit me too for this little pocket cannon. I think they really shine on the Smith J-frames the best for so many reasons. I wouldn't put 'em on my Glock though, or my 686+ for that matter, just the snub revolvers at the moment. Lasers work better on some weapons and not well on others, in my opinion, and with the case of these snubs, they work best, almost like they were made just for them.
I started out kind of against them mind you, but getting this 649 and then these grips for my wife, it kind of opened me up to them. As long as they don't get in the way and you don't depend on them at all, they are a very good thing to have on a small pocket, IWB, or purse carry revolver intended for close range defense.
So knowing what you know now, if they sound right for you, get 'em. Make sure to read up on them though, different ways of zeroing them, deploying them, etc. As for me, I think the CT grips go with J-frames like peanut butter and jelly.