TruGlow has a low profile red/green undermounted laser that has caught my eye. But, it's kinda low on the priority list.
I purchased a bore laser specifically to see how straight the sights were on my 9mm's. After only 15-20 seconds of being on, the batteries died out. The same thing happened with a fresh set of new batteries. Perhaps what I bought just wasn't high enough quality or maybe it was just a dud. But I've had better performance from the red-dot I have. I can easily see using lasers for training/testing/measuring. I just have a hard time believing they are all that valuable in the real world for the average individual. I have no doubt that in certain situations, they can be of great advantage. Especially where military and LEO work are involved. Maybe hunting.
When you have a gun that's more accurate at 7 yards and another one that's better at 10-15 yards, how would the average person know to compensate for and accurately match the perfectly straight laser beam with the curve of bullet path? A faster bullet is straighter but not necessarily more appropriate. It all gets circumstantial. Like what grain of what caliber to use in what kind of situation.
I've seen people at the range that hit all over the paper. Those that couldn't hit the broad side of a barn and are in dire need of more practice. I can't see the use of a laser being much help to them. Infact, watching some of them bounce their laser around can be VERY distracting.
I can understand people wanting to 'look' modern or cool and I can also understand owning various lasers but there is a place for it and then there are other places.