The balls 4 can be rotated in all directions, so you hinbekommt good illumination ... rather, should hammer out:
1. weakness
Unfortunately, the balls do not stay in all the positions available. Since the joint is a bit too loose, the ball slips sometimes another step down so that the light cone is not there, where you want it.
I do not screw found on the one could make fixing a little harder.
2. weakness
The square sheet, so the thing to which the hanging balls 4 is very thin. Here you really have to be very careful that you do not bend. For example, during installation, or the set of balls, as long Handrails in adverse movements can press the sheet on the balls.
Since you the lamp no assembled every day or newly established, I think that's not as bad as the first weak point.
All in all, one can not expect more for the price well. Already have some more expensive lights looked at the hardware store or furniture stores, most are processed not really better.
The 3 star rating there is just (3 stars means "not bad") because I rate the point with the "loose joints" of the balls already as serious as provide optimum illumination is not possible. And that's probably the main purpose of a lamp, at least for me.
Look really great and in any case an eye-catcher.