I have one of these H-1 red dot sights mounted on my Ruger Mark III Hunter pistol. It holds zero beautifully and really improves my accuracy. This small sight is just as good as the larger Aimpoints and does everything just as well. You pay for the smaller size but for a pistol it is worth it.
Pros: Very small and light; easy to set up and zero
Cons: Not cheap.
This review was written in the old system and had content requirements that are different than reviews written today.