The ONLY downside over the Canon 600 series speedlite is that it’s not weather sealed. Other than that, this is vastly superior in every way. Recycle time and battery performance is unmatched. Build quality is great, it’s a bonus not having that annoying rotation/tilt lock button on the flash head which makes changing light direction way faster at a wedding. The wireless functionality & menu system is also top notch. Once you're in the Godox system there isn’t anything else that is even tempting me out of it. Love these, I have 3!!!