If you have a beard and smoke, this is the best option. Don't have to pass a fitness test b/c air is on a positive feed supply. Since the filtered air blows over your face, it keeps you cooler, and doesn't need to seal around your jaw. Now that I've made the jump to PAPR, I've forever retired the full face respirator. If you work in a boatyard like me and have a beard, ask the manager to hook you up. This mask will keep you cranking when the heat is up. The peel away film for painting works great.
The PAPR units are well made and perform just as they ought to. Very comfortable and quiet running. A big step up from the usual face mask respirators. If you are spraying toxic type paints the PAPR is a great way to go.