Review (1/5): doesn't work with a Gillette Mach 3 handle
The package advertises that these blades fit a Gillette Mach 3 handle.
I bought a package of 5 and discovered that, while a Daylogic cartridge indeed "fits" over the end of a Gillette Mach 3 handle, the cartridge will not latch, so that it uselessly falls right off the handle the moment you apply the cartridge blades to your skin.
I really wanted these to work...