I found this place before I started vaping so I started with eGo Twists and Stardusts. Didn't particularly care for those. Got some Mini Vivi Novas which did quite well, but the flavor is a bit muted for me probably because I vape VG. They do seem really reliable and easy to maintain, though. Tried some Kanger T2s (leaking) and T3s (dry hits and battery fit issues). I really liked the flavor on both of them and the T3s are SO easy to fill. This makes me a bit sad.
I'm playing with the Pheonix XL CE3 bottom coils today and they're doing quite well. Very clean, full flavor. I might have been a little intimidated by the necessity for syringes when I first started, but it really is pretty easy. I figure they're cheap enough, I can just fill a bunch and concentrate my cleaning on one or two days a week. The capacity is about 1ml, so I'm guessing most vapers would need to adopt that sort of strategy to have this work. 1ml isn't enough to get most vapers through the day.
I did also just receive a Splitfire and a regular Vivi Nova, but I haven't tried them yet. I'm sure the big tanks are going to look funny on my Twist, but I wanted to see if increased capacity and/or increased wicks would have a better effect on flavor production.