I will start by saying, I have no experience with laser sights.
But rail mounted laser sites are an obsolete, inconvenient, waste of space, now that the technology has advanced to the point where you have CT grip mounted sights, Laser max sights replace the Guide rod, or the laser and rear sight combo.
With these alternatives you can either have an easier time finding a holster or free up the rail for some other option you may need, such as a white light.
It's like computers, and cell phones, I don't know a lot about the technology, but it has been fun watching it shrink and advance