I have a 15 year old (or so) professional auto dark welding helmet, I decided to order 3 new lesser expensive ones from Amazon to test out.
All 3 have provided a far better experience than my old $350 unit! What I can not speak to (obviously) is long term durability of the auto darkening functions and dirt/grit resistance of the controls.
This one, I'll call it the second of the 3 I just had shipped in, has the super large viewing window. Wow. I've never used a mask with the large full viewing area. I really like it! It helps greatly when your wrapped up tight under a vehicle and can not get your head and helmet fully aligned with the work location, with this you can actually look up/down from center with your eyes even though the helmet is hitting against something and can not be aligned correctly. This makes your welding job so much easier! It's the big screen TV equivalent of a welding helmet.
The first thing you'll notice if you are like me and coming from the older style is that these are "true color". That does take a bit to wrap your mind around, I am used to the greenish sort of night vision look of my old mask. These do not at all look like what I was used to. These provide a view that is 100 times better, both prior to the arc and during the arc.
If I were to call out a negative point on this (2 of the 3 welding masks I ordered have this same feature), and trust me it is subjective.... I am not a fan of the adjustments on the outside. I'll explain. They are more exposed to dirt and grit, they can be stuck on objects and damaged or could be rubbed and moved into an unsafe condition (related to eye protection). I would prefer the style with controls on the inside to mitigate these issues from a personal point of view. I say it is subjective because maybe others prefer the outside position like this so that the adjustment can be done without removing the mask, maybe the job is in a standing position working at a bench where rubbing and striking the controls is a non-issue. I work on vehicles and typically am shoving myself into awkward and cramp locations and bang the welding helmet a good bit.
The adjustability of this is all that you need. You can go as low as grinding mode or go into dark shade modes for welding with your preferred technique. And you will be shocked how much the image provided looks like you have on sun glasses! No more odd greenish hue. Honestly, I will never go back to my old welding mask. This is life changing!