Four blades over three

Next month Schick is releasing the "Quattro," the first razor with four blades. They're trying to unseat the market dominance of Gillette's Mach 3's three-blade razor. Unfortunately, there's no pictures yet on their site. The trials and tribulations of design and one-upsmanship are documented in an All Things Considered piece you can listen to here. I use the disposable ST. Though I never seem to dispose of them.