I got myself the unit to emergency flashing at a forthcoming wedding to - I have to say it did not disappoint me. Although I do not really have much experience with such clip-on, I'm very quickly come handle it and was able to save some motifs so. The range has also surprised me, I was expecting less. The angle can be easily adjusted, the reflector card and the lens can also be easy to pull out or put away, and the charging time for the flash is ok - of course not for the shooting mode) I'm sure more than 200 times flashed on the day with 08/15 batteries from the electric market for 4 euros - and there is still juice in it. Operation is simple, even if the flash has no display, but only shining buttons.
The only drawback: The screw base joint I find not just handsome, but somewhere you have to make compromises in the price. Sometimes he hooked when plugging in or unplugging something and when it needs to go fast times, bothers you.