The main feature I have come to appreciate most is the face screen, I used hard hats and muffs for a long time, but, once I started using the face screen I never went back to the old way.
Much less ends up on your glasses and when you are cutting a log with the saw in the vertical with the bar end down it really cuts down on the amount of stuff you eat. Plus, it really saves on branches and wild flora catching you in the face, plus, helps on keeping the ivy bits off your face.
I always wear muffs, no plugs, because it really cuts back on the bugs, both annoying and biting, from getting in and on your ears. Removing them multiple times in an hour, to hear someone else or to hear a tree as I am making the final cut, would just invite shoving something foreign back into my ear with the plug.