I couldn't wear that thing and keep a straight face and my family would rip the p**s out of me unmercifully.
It looks to much like you should be catching flies with your tongue.
It is probably at least as good as the Racal thingy I have - which is rubbish. It cost over £100 7 or 8 years ago. It lets in dust from all sides, the visor picks up static and attracts dust literally like a magnet, the batteries last forever, so I never remember where the hell the charger is when I actually need it.
My advice -after trying everything on the market (I am nothing if not thorough in these things) is to use a good mask (eg 3M) and safety specs. That way, your lungs are protected and you can see what you are doing - which is not only an aid to safety but it makes woodworking easier too.