I have 2 of the Unimax Green units, and 1 of the Unimax red they are excellent. The only prob you will have is finding a holster that you can use that will fit your gun with them on. They are easy to install and line up the laser to be right over your front site. The biggest prob with holsters, even the ones made for your gun or a generic balistic nylon one that will fit a laser equiped gun, is that the Unimax will turn on by itself if it gets bumped. Call the customer service people at Lasermax and ask for the "cut down" activation switch. What they do is grind off the standard unit (the wings is what I call them...lol) so that they don't activate on their own. I have also found the best way to carry my Lasermax equiped Glocks are in a Smart Carry system. They are deep concealment, and extremely comfortable.
Good luck and always stay safe.