I've heard that the 3rd party Metz's have more control and are ultimately cheaper and more versatile than say a Nikon Speedlight SB80 or SB800.

What's the general opinion of those who've had the luxury to use both and can compare?

IMO, sometimes I feel that the SB80 is inadequate for event photography (weddings, dinner functions). My friend says the Metz is good.

What say y'all?