this tank is the best on the market at the moment. There are many many coil cores to choose for suiting everybody's individual needs. I never had any leaking which is important to me and why I still cherish the Atlantis 2. It's not something I'd place loosely in my jacket pocket, but unless somebody begins tilting the tank for a bit, nothing leaks and there are 8 airholes I think altogether which would make it a tank that could easily be a leaker. So many people are on the fence about the TFV4, but if you can spend the money on the regular kit, rush and buy it this minute because the sooner you try it, the sooner you'll be in vapor heaven, experiencing vapor and flavor bliss.