It took me a week to make the transition completely. I vaped as much as I wanted, yet still had craving for a smoke occasionally. I allowed myself to smoke half of a cigarette, put it out, and saved it for the next craving. Those butts tasted pretty bad, but that helped me to quit.
After a few days I grew to prefer vaping, and not want the cigarettes at all. The cigarettes quickly began to taste terrible.
Of course, I REALLY wanted to quit, and was determined to allow vaping to replace my smoking.
I was using a SmokelessImage Volt cigalike starter kit, using their Ice Menthol flavor. Within a month I purchased my first "mod", a Silver Bullet and a cartotank. A few weeks later, I purchased my first Provari. Still using the SB and Provari, and now building my own coils/wicks in RBA's. Over 3 years smokefree.
Finding the "right" flavor is just as important as using the "right" gear. Not expecting to replace the taste of a cigarette was key for myself. I began with a menthol (Marlboro Menthol smoker), but quickly moved on to fruit, coffee, and desert flavors.