Lack of precision in the manufacture

I had high expectations for this laser spirit level from Bosch, but was already disappointed after unpacking. Placed on a flat surface showed both dragonflies on a slight imbalance, the bubbles were a long way from the center.
Now I had first suspected, the surface is not as flat as assumed. So the device unceremoniously rotated 180 degrees to see if the dragonflies now deflect in the opposite direction. None. The bubbles hung still at exactly the same point.

My hope was now that at least the laser alignment are precisely linked to the dragonflies. Again, I was disappointed. After orientation of the device based on the cross-level I have the (then vertical) laser line checked on the wall at a normal level. Result was that the line was not exactly aligned vertically, but differed in two meters length approximately 1.5 cm to the side. Even for the more favorable price, I would expect that from the house Bosch more.