I don't have a lot of Injector experience under my belt, but I am blown away by the difference between the Personna and Chinese Schick blades. The Personna seemed okay, but the Schick is head and shoulders above in both sharpness and smoothness -- and the all-metal dispensers (aluminum, maybe?) just makes them that much better. The Personna can had for less dough, but I have zero qualms about paying a little extra for the Schick. I'm definitely going to stock up on these puppies before any "discontinued production" scares arise.