Kevin Roose over at New York magazine takes down the ProGlide FlexBall:

By now, everyone knows how razor companies make their money. They sell you cheap razor handles, then burn you later with expensive cartridge refills. On top of that business model, Gillette and other market leaders introduced an arms-race component to the industry – going from two blades to three, then to four and five and six. Each new blade adds only a smidgen of extra utility, but it convinced gullible customers that they needed to upgrade their models every few years to stay current.

I was suckered by Gillette for years. About 18 months ago I bought one of these beauties. I'm picking up good blades online at about 10 cents each (6 of our shiny British pence), and they're good for a week of shaves.