Just tryed a shick injector for the first time and the ease of use is amazing its easer to use then a cart razor I found it to give slightly better results (for the first time) gave a DFS shave I used a persona blade are the schicks sharper ? As I find sharper blades to shave closer personally I've had a few for a couple months but never tryed them because they looked like a predessor to carts but I recommend getting some blades if you've got one laying around maybe it was a family members,you got it off eBay in a lot or you just happend to pick it up try it what have you got to lose ? By the way any one know how if there is any way to date these if there are diffrent models ? The one I used is the one with the long handle