This is just my opinion, OK?
1. A Laser sight is not a replacement for actual iron sights. They are meant to be used when you can't see the iron sights, like in low light situations.
2. If not sighted in properly, Laser sights are useless.
I adjust my iron sights to be like I need them, and then adjust the laser sights to shine at the same point.
Don't misunderstand me. I actually LIKE Laser sights. I have 4 of them, but I seldom practice with them. For me, they are simply a backup for when I can't use the iron sights.