I was using a Revlon pencil sharpener, which I had for years. But last weekend when I was at the MAC counter loading up on Powerpoints, the MA suggested MAC's pencil sharpener. She explained that a lot of people say that because of the softness of MAC's pencils, other sharpeners don't work well.
I haven't used my new MAC sharpener yet, but I will definitely break off that little piece if it makes such a huge difference. I wonder why that piece is there to begin with?