A good explanation of how Utah's procedure will work, for those who are curious:
http://www.sltrib.com/news/2326783-155/firing-squad-gets-final-ok-so
I oppose the death penalty, but I think that if we have it at all, executions should be humane, yet they might as well be gruesome. For both those reasons, the guillotine and firing squad are both preferable to lethal injection.
I'll ask again, what makes everyone think the firing squad sound would be more humane than lethal injection? People keep asserting that notion in this thread without any real explanation or data.
It's not more humane, but it's more gruesome. More gruesome means it's more likely than there will be a backlash against death penalty.
