As the pictures show very clearly, the performance of this small electronic "microscope" is very interesting: a wide range of magnifications, the substantial absence of the most common optical aberrations (especially the chromatic one) and ease of use are its undeniable strengths. I use it with satisfaction to highlight the imperfections of the tiny nibs of the fountain pens I deal with. One of the images shows just a small detail of a spring with a tine misalignment problem that is only visible at such a high magnification. The adjustable LED lighting it is equipped with is undoubtedly comfortable.
It's a pity that many good qualities are probably largely thwarted by one "small", but not insignificant, mechanical detail: the support is really too precarious and inaccurate.
At such high magnifications, the field of view is really very small and the depth of field is reduced to less than a millimeter. Manipulating the magnification setting, or even just touching the device, requires a significant and tedious undoing of the adjustments achieved so far to start over with a frustrating investigation of the area to be framed and focus. The higher magnification images - the most critical - required long minutes of trial and error and a great deal of patience, almost holding one's breath, with a strong temptation to blow it all up...
On the other hand, it is also necessary to take into account that a tool with such a modest cost cannot be equipped with a support that is too different: it is a “category of products”.
I found the included little silver tray completely useless (for my purposes).
I must point out that I used the device and created the images by connecting it to my MAC and using a system SW, PhotoBooth, which is more than suitable for the purpose. In this mode, the two buttons marked "+" and "-" are not functional, which are only wirelessly active.
Overall, I'd say that the essentials of the device are definitely noticeable... as long as you can fix its position stably and securely.