Waited a long time for a laser to fit the 709 slim - it was worth it. Just took a couple minutes to read the instructions and understand how to install it, snaps together tightly and tightens perfectly - someone less mechanically inclined might scratch their head a few times. This entire assembly fits nicely against the guard, finger switch is perfectly placed to activate as soon as you grasp the gun - you don't even have to think about it. Doesn't add a lot of bulk, still fits in the same Uncle Mike's holster. Instructions say it is pre-aligned, not so... a long ways off, but very easy to get back on zero. Got this for my wife's gun, she loves it, especially due to the fact it doesn't add bulk. I'm tempted to get a Slim of my own just to put another CT on it!
Pros: well contoured, easy to install, well positioned switch
Cons: none, other than not available in green laser
This review was written in the old system and had content requirements that are different than reviews written today.