I guess I should chime in here too. I have been analog free and vaping for just a few days shy of 17 months now. I followed the suggestion of someone here when I first started. I got all my ecig supplies and charged all my parts. The very next morning I started vaping and simply did not light another cigarette. First couple of days were a bit rough. But then got better. Third day as 20% vG juices mostly Dekang. I have since worked myself down to about 12mg with a 70%PG 30% VG base in both commercial as well as home brew juices. This seems to be my sweet spot. Just enough nic to keep me calm and relatively normal. Not enough nic to cause me to be shaky or keep me awake at night.
I did have quite a few side effects in the beginning. Dry mouth, itching, coughing, irregular sleeping patterns, facial breakouts, etc..... I still get the occasional breakout and still have some itchy skin issues (only after shaving, fixed with Lubriderm lotion). The break outs only seem to happen after I have used products intended to stop breakouts. Go figure. Plain soap and water= no breakouts. Hmmmmm. Don't know what is up with that. Dry skin is an issue that lotion seems to mostly take care of. I drink more now which solves the dry mouth issue, and my sleep is back to as normal as it gets.
I smoked an average of 2+ packs per day for just over 26 years. I had not really suffered any cigarette related problems when I quit aside from the dreaded smoker's cough, so I am hopeful that I quit before it was too late. I no longer wake up coughing and I no longer get a month long cough with every cold that comes my way. Getting sick now is generally a few days when before a simple cold would last weeks. I feel fantastic, can taste my food the way it was meant to taste and I no longer smell like I have bathed in an ashtray. I have not regretted vaping nor do I plan on quitting my vaping hobby any time soon (it simply tastes too good).