Thought I'd let you know, I have a cool fire 1 and really like it. It is very sturdy and feels good in my hand. There are some limitations. It only takes 18350 batts, and it is fixed at 8.5 watts. The iclear 30b is a good match for the device. 8.5 watts seems to be the sweet spot. The I clear 30 works well too. I suggest taking out 1 strand of wick on the coil, seems to hit much better. The 18350 battery does not last very long with the duel coil tanks. If you plan on using this all day you will need at least 1 more battery, depending on your vaping needs.