I started out with the Evod's, then T3's, then PT2 and PT Mini, iClears, Davide. Got tired of replacing coils so I started rebuilding W/ cotton wicks and this quickly became a P.I.T.A for me having to deal with the small coil head. I could tell the coils, whether stock or rebuilt quickly degenerated after about a day at best and I started tasting the burnt taste of the coil/wick over the flavor of the juice. At the time I was mainly buying juice from Indigo, mostly tobacco's, nothing sweet, no coil-gunkers. I was really getting dissatisfied with my whole vaping experience, so I started back smoking on the side.
Fast forward a couple of months and my daughter came to visit for a week and had this thing called a Kayfun. She said "Dad, try this, you won't believe the difference" and oh boy was she telling the truth. I couldn't believe how great the flavor and performance was. When I asked her the price, I had to think hard about investing that kind of money in a vaping device....but by weeks end I had ordered the original Kayfun Lite. I don't regret a single penny now in the cost. It has turned out to be a great investment and I've never once had that nasty hot coil taste I once had to endure. When I add up the money I spent on various tanks for my wife and I...I could have easily bought the KF to begin with...and I went on and bought my wife the KF Mini...I'm happy, she's happy...we all is happy...Now!
Edit:...oh and that was 9 months ago and haven't smoked since.