What he said rings true, it is definitely loud for use during weddings. Sounds like a swarm of angry bees. But it is powerful too, can stay stable in 20+ MPH winds and fly for over 20 minutes. It would be better for before/after pics of a wedding rather than during the ceremony.
As far as the carbon fiber props, they don't have any good advantages over the stock props, and they can cut people pretty easily and shatter when they hit something solid.