I practiced with mine alot when I 1st got it and it's very useful for developing muscle memory without using alot of ammo. I have a Crimson Trace on my M9 and have practiced enough that I can draw and shoot without aiming and get consistent center mass shots on a target at 10yds(practical SD distance). It could come in handy, if being shot at to hold around a barrier and peek from a different angle to minimize exposure; far better than spray and pray!!