There is a slight minimal deviation, but still I do my job as I have a more expensive machine from another company for verification but also analog.
The only flaw is that when it is in its box, with the slightest shake, the ON button is pressed, resulting in it staying on without you knowing it. So be careful when you put it in its case and store it.
It is reliable for amateur use but also for professional use.
I would prefer it again, sturdy and quality construction. I hope I helped.

Very good and expensive. The little gear that you turn requires pressure to rotate, however, I have gotten used to it and it is flawless.

The only (small) complaint I have is that the pulley does not move very smoothly and it is somewhat annoying in the hand.

For amateur use, it is quite good and reliable. The case protects it quite well. In addition, it includes 2 batteries and the required screwdriver for replacement.