Sifus,

I currently own a Canon 60D + Nissin Di622 speedlite.

I bought it last year when I was just trying out photography. Now I plan to go more serious into photography and shoot professionally.

I don't know is it just my Nissin Di622 problem, but sometimes the flash will stop functioning/freeze, then I need to restart the flash. Sometimes, the Nissin flash will misfire too (the photo turn out very dark) .

I'm just worried this would happen during a event function photoshoot when I'm shooting for a group or something. I doubt I can ask them to wait while I restart the flash, etc.

- Is it worth upgrading to a CANON 430EX II speedlite?
Will the Canon original speedlite be more reliable for professional use?

Thank you in advance for your guidance!