I put one on my PT738. I like it; I do cover up the laser with black tape to practice without it. You never know when it will fail. I like the fact that I can carry it in a pocket holster and have my hand on it when I am approached while night fishing. With this little gun it can also help you with grip technique and trigger pull. Practice dry firing, at first that laser point was jumping everywhere. After some slight adjustments to grip and trigger finger placement I can hold on target a lot better.
It is a personal choice and people will always be on both sides of it. The important thing is to do what you are most comfortable with.