Macro Flash for a small price

Read reviews and almost did not buy. I have the flash for a few days now and am very satisfied. He does what he is namely light and at macro almost too much. For portrait shots not yet used, but for shooting in the mouth zB.Super!
The excess of light I had in my D7000 to manual - Change 2.7. The sculpture seems to cheap and the processing is just according to the price. But what do you expect for nearly 90 different ring flashes when normal starting out at 200.
Here read in the reviews that the flash is too weak, I can not understand for the life.
Continuous shooting (macro) shot, the first two to the third light illuminated properly. You have to change the exposure manually in the camera menu.
This applies only to macro shots. One star less is only for the processing and the cheap appearance.
A variety of my battery did not fit, so that the flash got no electricity.
The batteries should therefore be slim, so you have game in the battery compartment.