Quite frankly, there is nothing wrong with these sights. They have a back-up role to RDS, they are not the primary sights. I have the pistol set to 25 yards and the Holosun as well as the back up irons let me be very accurate if I only do my part.
With the right holster, this combination is great as a home defense gun (with +3 magazine) as well as EDC with flat bottom 12 round magazine.