I bought the Jonsered helmet last year after a freind of mine got clobbered by a piece of falling rotten wood. It fell about 40 ft . It was about 12in long and 3in diameter. Broke his skull.
But about the helmet. I find a rarely have the screen down when I'm cutting anyhow. I wear safety glasses so it just seems to get in the way. I worked in a sheetmetal duct fab shop and they gave me a standard MSA hardhat with the hearing protection muffs that go in the slots on the side of the hat and find it much more useful. If I would have worked there before I would have saved the fifty bucks on the Jonsered set-up. I'm thinking about selling it on E-bay.
Using safety glasses, while it works in many cases. They don't protect your face from the chips and pieces of bark or smaller branches that can come flying back in falling situations, if you are just cutting firewood in a more controlled setting then I agree, I rarely drop the faceshield if I'm just bucking up at the landing or cutting firewood. But if you are in the woods falling or cutting tops, especially if you are sweating bad or its wet, then the face shield is superior to the safety glasses, which will fog or get coated in wet chips and you can't stop and clean them everytime a drop hits them or you are wasting time.
With glasses your eyes are protected, but I don't like getting my face "sandblasted" for no reason, even if my eyes are protected.
You see with the faceshield you can have crap all over it and you will rarely ever focus on it. Honestly I can't say that I have had to actually clean the faceshield.
A good name brand combo helmet is a handy piece of equipment.
Another thing about these combos you will find is not so much safety related as it is comfort and efficiency related, is take a look at a guy that just uses those aluminum helmets with ear plugs and safety glasses at the end of the day they look like they just bobbed for apples in wet saw chips, they will be coated with chips, in their ears, around their ears, all over their faces, cheeks and neck.
Where as, the faseshield and over ear protection also provide some measure of cleanliness, from the chips, LOL.
Also, when you have a combo helmet you just have to keep track of one large item. Watch those guys with glasses, ear plugs and helmet get ready for work, fishing around in their pockets for plugs, they are poking things in their ears, looking for their glasses (that are always dirty) and then helmet.
With a combo you just throw it on and you are ready to go. You can hold a chainsaw in one hand, walk to the woods, and mount and adjust everything with the other hand while moving toward the work.
You can argue that combos are slightly heavier and hotter, but in my opinion, these are minor compared to the constant effort required to maintain some level of safety and cleanliness when logging with multiple individual safety items.
Ear plug wearers are always saying,"Hold on, I can't hear you." then they pull out their plugs with their dirty hands or have to take their gloves off, then take the plug out, ask you to repeat yourself, then put it all back together again, LOL.
LOL, I'm just too lazy to go to that trouble. I use a combo helmet and everything is right there with one hand, I can pop things up and down, on and off and still not lose it, unless you loss the whole dang thing, and if you do that you have issues, LOL.
My opinion,
Sam