Yes, they really work. I also haven't smoked a single cig since I picked up an ecig. You have to give yourself a lot of credit too, though. You're being honest with yourself about your craving. You're not having one. I see many folks try this, and they talk themselves right into "it's not working for me". Partly because, they don't really want to quit.
One really important thing to remember is NOT to wait until you crave a cigarette, or you'll be torturing yourself. The delivery system is nowhere near as efficient as a real smoke, it takes longer for the nic being absorbed by your mucus membranes to reach your system. A cig, in the lungs, goes immediately into the bloodstream. Water vapor borne nicotine is only absorbed in the mucus membranes of your oral and nasal areas. You need not even breathe it into your lungs, the vapor molecules are too large to be useful there.
Head off the nicotine cravings by vaping AHEAD of your urge. I can already tell by your attitude, you're going to make it. Congratulations.