There are 5 blades on each cartridge, this is achieved by having the blades 30% closer to each other than the Mach3!
The blades are treated with Vitamin E and oils, and there's an indicator when it's time to change the blade. The Ferrari of blades.
Also, on each blade, there's a precision trimmer special for the Gillette Fusion Phenom, allows easy trimming of sideburns and other facial hair.
Each blade will last 20-30 days, giving that you use it every day. The indicator will tell you when to change.
When i can get a 6 pack for $15 pickup at the shaver shop this is not viable to buy.