Disappointed dun Sigma EX 140 crashed quickly and really not practical to adjust, I was pleasantly surprised by the build quality, very good, the Yongnuo.
The menu and the buttons are exemplary and very easy to adjust, super simple. First successful test, really happy with my purchase.
Having previously owned a Yongnuo flash, I'm not worried about reliability.
This is a brand that goes up and that every photographer should consider both brands exaggerate the price of flash