The only time I have an issue sighting it in is when it's dark. I like the gun, and plan on starting to add it to my carry rotation, but I don't carry a gun for SD without night sights. I like them, and I don't like being limited to point shooting.
I'm now leaning towards the XS standard dot. The big dot looks great on the bulldog, but I think it might be a little too big for me. The setup you have on the 101 looks great though. I have pretty good vision, and it looks like it will give me plenty to focus on.
Is the POI about the same with it as it was with the stock sights?
si vis pacem para bellum