The BIG advantage is the spur is a lot lower, take a look at the pics in the low profile hammer mods in the FAQs. It has a half cock notch to make it safer(not as safe as a transfer bar) so the hammer isn't resting on the firing pin, but the shooter needs get in the habit of pulling the hammer back to the half cock position after loading. Fortunately the ejector will ride over the firing pin and push it out of the way with no harm, I thought maybe it would shear it off but it doesn't.
Tim