I passed the 1 year mark last month after smoking analogs for 14 years. But I did not quit immediately after getting my first e-cig. I got my first e-cig, a 901, at the end of 2008 and I didn't have the best experience...not because the 901 is bad, I just got a bad one. Stopped using it altogether out of frustration and then ordered a 510 in June of 2009 and have never smoked since. But I learned that I failed the first time for other reasons besides a crappy device:
1. When it arrived in the mail I still had 5 packs in the house. Make it a point to "finish off" all your analogs before you even open the box and tell yourself "ok now I'm going to smoke this going forward."
2. I never smoked analogs in the house so when I got the e-cig I was so excited to smoke in-doors that I stopped taking "smoke breaks." I kept craving a real cig even though I was od'ing on e-liquid and finally realized I was craving my routine, my smoke break. So the 2nd time around I used the e-cig exactly the same as analog and smoked it outdoors for the first week.
After 1 week of using an e-cig and ONLY an e-cig, the smell of an analog turned my stomach. Most (not all) find that if they go for a week or two of not smoking analogs, you will lose your taste for them...I get calls from customers all the time telling me they messed up and tried to smoke an analog and they choked on it. It's different for everyone of course...but this is what worked for me.