The manual is only available in English, which itself does not disturb me at all (something better school English handed me off). The buttons / switches but largely self-explanatory. You have to know that the red leasing loan means that the flash is charged only.
Setting options are plentiful - E-TTL on my EOS 650D works flawlessly. The best results in living rooms I achieve, whom I reduce by one to two thirds aperture in the camera's flash control. Comparing installation Lightning vs. Neewer with softbox with identical e-TTL settings appears at small distances a (expected) identical brightness, but a much better color fidelity when external flash.
But Flash designers get their money. So it is quite easily possible in several steps, the light intensity between 100% and 0.8% (1/128).
Once the lighting conditions are difficult, the external flash can play your strengths. Whether the guide number is right - I've never tried remeasure - the results speak but that he has more than enough for my use reserves.
The flash is also available as a set with remote triggers and recipients - in this subject I have never incorporated.
When batteries are used Eneloops Series BK-3MCCE (were various forums, according to the "best", as of end 2014). That it occurred occasionally times that the flash is not fired in sequential shots - given - Physics is physics :-)
