For its price, I believe the product is excellent. It definitely requires patience to focus the image, but we are talking about a microscope, so high magnification comes with difficulty. However, it is achievable and it has good and clear image quality (for its price, of course). In the photo, there is a turntable needle as a sample of the device's capability...
For anyone who knows why they need it and understands the requirements it should have for this price, I consider it a good choice.
I don't know about its durability, but if I encounter any problems, I will update.