it's a real excellent flash to use. I have no complaint of it's usage.
but QC is questionable. the hotshoe just got loose few month after use that i need to get it to CSC for warranty repair.
and after a year and a week, the flash is having recharging issue and need to send it to CSC again. moreover CSC mention that the flashhead need replacement too as they seen white marking on it that can possibly cause the lamp to break soon (approximate 2000 shot of flash past year).
people that want to buy this powerhouse might want to consider the risk, as last repair cost me approx 40% of buying new one.