Maybe I should have not been so vague in my post sorry...
There are three main things that I do not like about my HF unit.
1. The headband will not stay tight. It pops to the next adjustment when I try to put it on tight like I like it !
2. When it is even mildly cool say 50 degrees F, the auto darkening gets noticbly slower. Below 30 degrees and it is almost useless....itscold up here 75% of the time.
And the third one was something that PoP mentioned...the plastic covers. When I first got the helmut it was cold and the area between the actual lens and the plastic would fog up...so bad that I had to remove the cover to weld. As a result the plastic darkening actual lens collected metl marks becauseof splatter .... I was (and am) not the greatest welder
My buddies (nice) helmut has a non-removeable glass cover and I did not think I could put anything eles over it....what are cheater lenses?
I guess I should mention one other thing. I prefer to buy tools that will last a long time. However, at the time I needed a helmut (love that spelling) and could not afford the one I wanted. The HF was affordable at the moment and allowed me to begin welding on my car. Although it did not last a year and was ready for retirement within 6 months of fairly normal use.
The HF unit as PoP mentioned is most likely worth th 69 bucks...I actually got mine for 59 on sale....
Rufus