I recently went from the Tpp DM 3 to the Dm 1, the difference being the DM 3 is a 100 watt coil and the DM 3 is an 80 watt coil. I find these won’t burn out as quick even if I’m vaping at the max wattage with them. Only thing is sometimes the resistance on the coil doesn’t match what’s on my screen and it sometimes burns my throat.