“I only direct lung occasionally, less and less nowadays, but it’s always nice to have a set up when you need it. The only downside to the GTi in my experience, is the longevity. I was not getting much time from them until having the need to change them. This could be the type of juice you’re using of course and there are many factors that affect this. Correct temps, correct voltage / amp/ wattage. While they are firing, they are instant, unbelievable for clouds if that’s your thing, and flavour is very good too. I do wonder if there is a sweet spot for mesh and a high ohm with lower watts (mesh takes very little to power up) I was using them in the I tank with the vaporesso target 200. I’ve tried the 0.2, 0.4 and 0.15 and they all have superb vapour and flavour. A high performing sub ohm coil, could last longer by today’s standards, likely a mesh issue rather than shoddy workmanship, vaporesso are a top company. Try a slightly lower wattage as it takes very little to get heat through the mesh, despite the ohms and hopefully you can squeeze more life out of them.”