I'll admit to using plastic disposables, but: I've been using the cheapest ones I could find, and getting lots of shaves just fine. Then some months back I could find only triple blades in our usual store. I had had triple blades before in life that shaved about as well as single blades, but these damn things felt like giving my face a bikini waxing. I soon found basic single blades back in stock, and I'm cool again.