For product itself:
She is loud and has a good stop. One notices a clear difference to normal (non-mechanical) keyboards. The brightness levels are appropriate, but the last stage apertures greatly. Unfortunately, even the multimedia keys are missing and you have to make a monkey grip. I find personally a pity. But you probably wanted to make the keyboard is not too large.
If you look at the price, you have to actually expect more. Especially in quality control. Such errors should not happen. In my opinion, the price is about 40 too high.