The first use of the tank was great. From there it goes downhill. Coils flood after first refill of the tank and are useless thereafter. BEWARE! Do NOT use Joyetechs Notch Coils with this tank! They flood like crazy and will spit boiling ejuice. Hopefully you won't be vaping when this happens as I was. This has to be the worse tank on the market. And with the Notch Coils one of the most dangerous I've ever used. I contacted Joyetechs customer service to inform them of their defective Coils. Let's just say I'll be contacting a lawyer over this.