The product may suit your needs. I have no direct experiences with the company.
That said, the product would not suit my needs. I do value a laser assisted target acquisition system, and my money goes towards crimson trace. The crimson trace lg-405 model is quite handy on a J frame.
The primary difference seems to be the means of activation. The laser you linked to requires you to manually activate the laser by removing a finger off the grip. Then, if you want to turn it off, you have to click it not once, but twice more. Clicking it once more gives you a pulsing laser.
I personally like the ability of the crimson trace grips to activate and de-activate with a simple squeeze of the hand. My grip positioning does not change nor does the laser draw attention to itself by pulsing before I want to turn it off.
If your primary use of the laser is for target practice, then the laser you linked to would seem to be fine. If, however, the primary use of the laser is for self defense, I would caution you against the product. That pulsing laser or straight beam is a dead give away.. and the fact that you have to manually engage in an unnatural fashion prior to use will cost you precious seconds. The crimson trace grips, on the other hand, need not be activated in any manner other than squeezing when you are ready to fire - and they will remain off before that, giving you the capacity for an edge of surprise and positioning in a self defense scenario. The CT grips are easy to use and dynamic in the sense that you have immediate control over their use without additional manipulation of the firearm.
Unfortunately, the crimson trace grips are also more expensive, but you can find deals from time to time on davidsons, from buds, from local dealers, and from personal sellers. Crimson trace also stands behind their product - and that I do have personal experience with.
Best,
Tony