Fit and finish were a little better than your average ncstar product - NcSTAR AR15 Green Laser w/A2 Iron Front Sight Post

I just unboxed this and have yet to mount it, but initial examination would indicate that this is a relatively decent product; there were a few tiny holidays in the anodizing, but the casting of the metal parts was good. The A2 sight is functional and works as it should. The laser is bright and appears to track correctly.
Being honest, the laser is largely for show. In an actual Home defense/CQB situation, it's only to let your target know that they've been targeted in hopes that it will scare them off; my AR has a 1 MOA EOTech for actual aiming purposes. All a green laser does is give your position away. It might be fun at the range, but the EOTech does the same thing without drawing a direct line back to me. But if I can dissuade someone who may be breaking into my house with a big, bright green dot and not actually have to shoot them (because if I'm using this, they're about 1/10th of a second away from that actually happening) then it's more than worth it. I'm sure it's significantly more effective than yelling "Stop, I have a gun!".
With that said, all my buddies are going to want one :)