Incredible resistance. I have had it for 14 days and it still hasn't shown any signs of wear. The flavor and vapor production are also incredible. The ideal wattage is 120, but I have it at 105 with preheat or hard mode (depending on the mod I'm using). Basically, my mod gives me a few extra watts (about 5) for 2 seconds and then drops to the set wattage. The vapor production is amazing and it has the best flavor I have ever experienced from a pre-made coil! The room fills up in just a few minutes! I mean it. It fills up... It's unique, just like the king of lung hits, the tfv16. It simply can't be compared to any other tank. And this tank with its 9ml capacity is unbeatable. It's superior in every way, even compared to the tfv12! I'm looking forward to seeing how long it will last so I can try the dual mesh coil. I might lose a bit of airflow (due to its construction), but I'll have a richer vapor and flavor. However, the single coil is incredible with all the airflow open. I didn't expect that. And it's huge in size! The dual coil is even bigger... Incredible. Just like always with all the coils, especially with smok coils, start at a very low wattage and gradually increase it by 5 watts every few minutes until you reach the desired wattage, so you don't burn it and it lasts much longer. Also, like with all coils, prefer e-liquids with less intense color, as they have less sugar (sugar greatly reduces the coil's lifespan). And please, avoid using the giant tfv16 in cafes or other public places where people gather. You'll get criticized. Another revolution from smok. 19/6/19. Today, I started noticing a slight loss in flavor. Also, some liquid leakage... So, the coil is nearing its end. Practically, I will change it (and finish the liquid) in about 20-22 days.