TTL is quite accurate, can even control other than Master flashes Compatible with Nikon CLS.
The only drawback: The screen lights will not turn on as example. at yuonguo automatically with the backlight of my Nikon.
Workmanship is good, and high quality.
And to everyone here deduct the stars for an English guide ..... We live in the 21st century, English should be everyday. Moreover you buy a Chinese flash for 60, somewhere you have to draw the line sometimes. For 60 euros you get what Nikon 300 or more costs, because you will nevertheless times can use Google translated.