The best for the specific price.
I (amateurishly) wore them for 3 days, 5 hours each day, and I didn't feel any discomfort in my eyes.
In terms of wheel operation, the only time the darkness falls for fractions of a second is when there are many sparks, but it doesn't bother me

I use it for professional use and I am quite satisfied with its quality.
It lacks in durability, which is why I give it four stars.
The first one I bought broke after about three years. It started to not read the shine, resulting in not being able to shade.
Other than that, it is fine for its value.

It is quite good for the money. For operation, only mig and mma with basic settings externally 'DIN and SENSITIVITY' with two batteries with easy and quick access. Its plastic is hard and sturdy, and the headband has a front cushion. I would like it to be maybe a little lighter

Terrible mask..
I must say, at first it had good response times and the field of vision behind the mask is quite large, but after 6-7 months of use, the mask started to mix up its functions. For example, when I had it in wheel mode, it would switch to the welding function and vice versa. Additionally, the carbon material starts to fray as soon as the mask heats up. A very poor product from such a good company.

Very good mask, ergonomic, quick response and with many settings. Very good visual field as well and nice design.