I’ve been using a BIC Flex 4 now for nearly two weeks. First time with a BIC cartridge for a very long time. I’m finding that the shaves are starting to diminish quicker than when I use a Schick. I am only doing 2 passes WTG and ATG and using a brush and shaving soap. I bought a pack of three when my work had them on for half price. From memory I think it is my first time using a 4 blade cartridge razor.