Function: It is possible the LED lamp turn in just about all conceivable directions - very positive. In addition, the lamp has different levels of brightness and colors (warm white to cool white). The colors were the main buying criterion for me. There are actually very many lamps that use different levels of brightness, but very few that still can change the color. I often use this lamp on my desk, especially if I'm learning for the study, the different color modes are optimal. Meanwhile, I use only the Reading mode, because it is for me to learn the most appropriate. The Study Mode (bluish looking light) looks to me to be artificial and also acts a little less brightly in the highest brightness level as the Reading mode. I have not yet used the sleep mode. The illumination on my 1.4m wide desk is very good. Of course, the brightness can not be the same at all points of the desk, but it has been more than enough for me and convincing in any case.
Shipping time: As usual, Amazon, very quickly. Since there is probably not much to say.
Service: After a few days / weeks, I was called by a service employee who asked me if I was satisfied with the product, or whether there are problems with it. He also pointed out to me that some people report that the "touch-sensitive keys" not always respond, but came from a still glued protective film that you must (yes remove, it is very well glued and I would have :) almost not seen).
Total: Why are point processing / design some negative points, but the Amazon review nevertheless 5 stars? Simple: In this price range there is no comparable lamp with such a good brightness uniformity, color selection and brightness intensity. I have long wanted and decided finally for this lamp.
I regret not buying.