Well I make my own coils and make my own liquid, of the two making liquid is relativity easy and quick. I'm making tobacco flavored e liquid and there are enough tobacco flavors out there to choose from. I also feel the DIY liquids are cleaner and the coils will last longer. I'd say it's up to the coils to get the flavor out of the liquid and into the vapor so that's important also. There are some atomizers that can be rebuilt but you really need a RBA or RDA tank that give you screws to hold the coils. I'd just bought a tank that includes a deck to hold coils. I've used mostly nickel coils, I've tried the Stainless Steel without much luck and switched back to nickel. I've got the Smok Big Baby Beast, there tank version gives you a RBA and atomizers, I have 3 Vaporesso Gemini RBA tanks that are 22 mm and a Clapton wire will not fit, the Big Baby beast is 24 mm and comes with a Clapton wire installed.