i'm not a fan of HF stuff but my wife's dad bought one.....i the attitude, "yeah, right.....junk......"
when i used it, i was impressed........that was about 7 years ago.........my grandpa was in his 80's and was having trouble with his helmet......i took him the FIL's and let him try it........he was sold and i ordered him one......still using it about 4 years later.......
when i bought my mig about 4 years ago, i got me one.....still using it.....
the only thing that i might mention is that my welding instructor a few years ago used it and was impressed at it for the price......he was very skeptical.......he did say that he had run in to the cheaper ones having light and dark spots in the lens (not giving you protection)........he said the way to fix this is to lay the hood under a low wattage incandescent light and leave it for a few days to "balance" the lens.......don't know if he was full of crap or not ........he was a pretty sharp fella and an actual welding engineer......