This laser grip works really well. It activates automatically once you choke up on the grip. I've shot many rounds through it and out of the box the laser was very accurate. To date I have not had to change the batteries and I've used them quite a bit. The only drawback to this is the palm swell is a little bulky. If you prefer narrow grips, this may not be the most comfortable for you. Otherwise it looks clean and not like an afterthought like many laser grips do.