So much for "no wick, no coil". From the instruction booklet: "When you notice a deterioration in taste or quality of the vapor, it's time to change your pod. The suggested number of usage for each pod is five refills." They are also adamant about no dry burns and to ensure at least five minutes is given to the pod when it's filled/refilled. Haven't even fired this thing up and I'm already somewhat disappointed with it. Sheesh!