Published February 1, 2010. From Cook's Country.
If you use a knife to cut pizza, you’ll pull cheese in every direction. A pizza wheel is essential.
Update August 2012:
The Mario Batali pizza wheel has been discontinued. In its place we recommend both Oxo Good Grips pizza wheels, both the OXO Good Grips 4" Pizza Wheel for Non-Stick Pans and the OXO Good Grips 4" Pizza Wheel.
If you use a knife to cut pizza, you’ll pull cheese in every direction. A pizza wheel is essential, and we wanted one large and sharp enough to glide through thick and thin crusts without dislodging toppings. We tested five types: three with stainless steel blades, one with polycarbonate plastic, and one dual wheel. We discovered a good choice for nonstick pans (it won't scratch pans), but for overall comfort, extreme sharpness, and heft, one pizza wheel was named the test kitchen’s favorite.
This model won points for its well-designed wheel, which was easy to clean, its thumb guard, and the large, soft handle that absorbed extra pressure.
The clear plastic wheel won’t damage or scratch a nonstick pizza pan. The edge of the wheel is tapered, so it slices almost as well as a metal blade, and its slick surface mostly prevented cheese from sticking.